TW202414183A - Finger tracking correction method, electronic chip and information processing device - Google Patents

Abstract

The present invention mainly discloses a finger tracking calibration method, which is applied to an electronic device with a touch device and is executed by a touch chip or a TDDI chip of the electronic device. When the finger tracking calibration method of the present invention is applied, the touch chip or the TDDI chip executes: during the finger drawing process, detecting whether the finger number corresponding to each line is correct; and when the finger number is incorrect, executing a finger number calibration operation. Therefore, when the finger tracking correction method of the present invention is applied, the touch chip or the TDDI chip can calibrate the tracking of each finger of the touch device in real time when multiple fingers draw lines on the screen of the electronic device, thereby avoiding the phenomenon that multiple lines displayed on the screen cross 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 control circuits, and more particularly to a finger tracking calibration method integrated into a touch control device.

It is known that touch devices have been widely used in various electronic devices. Usually, a touch device includes a touch chip and a touch panel including a plurality of touch sensors. In recent years, with the maturity of embedded touch panel technology, touch display modules integrating touch panels and display panels have become the mainstream application. At the same time, IC design manufacturers have also launched touch and display driver integration (TDDI) chips that have both touch functions and display drive functions. As a human-machine 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 known touch device. As shown in Fig. 1, 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 noting that in some special application environments, users 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 positions of the fingers in real time when multiple fingers draw lines at the same time to ensure that the multiple lines are reported correctly. It should be noted that "reporting" refers to uploading the relevant touch sensing data of the multiple lines to the processor 12a of the electronic device 1a. Specifically, as shown in Figure 1, a finger tracking algorithm is integrated into the electronic chip 112a of the touch device 11a, thereby serving as a finger tracking unit 113a. When tracking multiple fingers, the finger tracking unit 113a will assign a number to each finger to track the position of the finger in real time, so that the touch device 11a can correctly report multiple drawing lines.

However, practical experience shows that when multiple lines are not simple straight lines, the finger tracking unit 113a is prone to misassignment of finger numbers, resulting in multiple lines displayed on the screen of the electronic device 1a intersecting with each other. For example, FIG2 shows two lines drawn by two fingers on the screen intersecting with each other. For another example, FIG3 shows three lines drawn by three fingers on the screen intersecting with each other.

From the above description, it can be seen that a finger tracking correction method is urgently needed in the art.

The main purpose of the present invention is to provide a finger tracking calibration method, which is applied to an electronic device with a touch device and is executed by a touch chip or a TDDI chip of the electronic device, so as to calibrate the tracking of each finger by the touch device in real time when multiple fingers draw lines on the screen of the electronic device, thereby avoiding the occurrence of crossed lines due to finger tracking errors when multiple fingers draw lines at the same time.

To achieve the above-mentioned purpose, 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 includes: Receiving a previous frame touch sensing data and a current frame touch sensing data, wherein the previous frame touch sensing data includes a plurality of previous frame touch position data, and the current frame touch sensing data includes a plurality of current frame 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 and the previous frame touch position data having the same finger number are matched and drawn into a line segment, so that after the matching of the plurality of current frame touch position data and the plurality of previous frame touch position data is completed, a plurality of line segments are drawn; A line segment crossing detection operation is performed to confirm whether there is a line segment crossing among the plurality of line segments; and If there is a line segment crossing, 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 end points of the line segment are simultaneously located on the same side of another line segment in the plurality of line segments; and Repeat the above steps until all line segments have completed the line segment intersection detection.

In one embodiment, 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 to separate a first data group and a second data group; Performing at least one second grouping operation on the first data group to match at least one current frame touch position data and at least one previous frame touch position data, and making the matched current frame touch position data and the previous frame touch position data have the same finger number; and Perform the second grouping operation on the second data group at least once, so as to match at least one of the current frame touch position data and at least one of the previous frame touch position data, and make the matched current frame touch position data and the previous frame touch position data have the same finger number.

In one embodiment, the first grouping operation includes the following steps: Taking the current frame touch position data or the previous frame touch position data with its position at the bottom and the leftmost as a scanning reference point; Calculating the vector angle between the scanning reference point and other current frame touch position data and other previous frame touch position data; Scanning the corresponding current frame touch position data and previous frame touch position data according to the size of each vector angle; Stop scanning when the current frame touch position data and the previous frame touch position data obtained by scanning have the same amount; and The current frame touch position data and the previous frame touch position data obtained by scanning are classified into the first data group, and the other current frame touch position data and the previous frame touch position data are classified into the second data group.

In one embodiment, the second grouping operation includes the following steps: Taking the current frame touch position data or the previous frame touch position data with its position at the bottom and the leftmost as a scanning reference point; Calculating the vector angle between the scanning reference point and other current frame touch position data and other previous frame touch position data; Scanning the corresponding current frame touch position data and previous frame touch position data according to the size of each vector angle; When the number of the current frame touch position data and the previous frame touch position data obtained by scanning is 1, the current frame touch position data and the previous frame touch position data are matched with each other, and the matched current frame touch position data and the previous frame touch position data have the same finger number; and The above-mentioned multiple steps are performed on other current frame touch position data and the previous frame touch position data until each current frame touch position data is matched with a corresponding one of the previous frame touch position data and has the same finger number.

Furthermore, the present invention also provides an embodiment of an electronic chip, which is applied to an electronic device with a touch function, wherein the electronic chip executes a finger tracking correction method when a plurality of fingers draw lines on the screen of the electronic device; the finger tracking correction method comprises: Receiving a previous frame touch sensing data and a current frame touch sensing data, wherein the previous frame touch sensing data comprises a plurality of previous frame touch position data, the current frame touch sensing data comprises a plurality of current frame 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 and the previous frame touch position data having the same finger number are matched and drawn into a line segment, so that after the matching of the plurality of current frame touch position data and the plurality of previous frame touch position data is completed, a plurality of line segments are drawn; A line segment crossing detection operation is performed to confirm whether there is a line segment crossing among the plurality of line segments; and If there is a line segment crossing, 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 end points of the line segment are simultaneously located on the same side of another line segment in the plurality of line segments; and Repeat the above steps until all line segments have completed the line segment intersection detection.

In one embodiment, 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 to separate a first data group and a second data group; Performing at least one second grouping operation on the first data group to match at least one current frame touch position data and at least one previous frame touch position data, and making the matched current frame touch position data and the previous frame touch position data have the same finger number; and Perform the second grouping operation on the second data group at least once, so as to match at least one of the current frame touch position data and at least one of the previous frame touch position data, and make the matched current frame touch position data and the previous frame touch position data have the same finger number.

In one embodiment, the first grouping operation includes the following steps: Taking the current frame touch position data or the previous frame touch position data with its position at the bottom and the leftmost as a scanning reference point; Calculating the vector angle between the scanning reference point and other current frame touch position data and other previous frame touch position data; Scanning the corresponding current frame touch position data and previous frame touch position data according to the size of each vector angle; Stop scanning when the current frame touch position data and the previous frame touch position data obtained by scanning have the same amount; and The current frame touch position data and the previous frame touch position data obtained by scanning are classified into the first data group, and the other current frame touch position data and the previous frame touch position data are classified into the second data group.

In one embodiment, the second grouping operation includes the following steps: Taking the current frame touch position data or the previous frame touch position data with its position at the bottom and the leftmost as a scanning reference point; Calculating the vector angle between the scanning reference point and other current frame touch position data and other previous frame touch position data; Scanning the corresponding current frame touch position data and previous frame touch position data according to the size of each vector angle; When the number of the current frame touch position data and the previous frame touch position data obtained by scanning is 1, the current frame touch position data and the previous frame touch position data are matched with each other, and the matched current frame touch position data and the previous frame touch position data have the same finger number; and The above-mentioned multiple steps are performed on other current frame touch position data and the previous frame touch position data until each current frame touch position data is matched with a corresponding one of the previous frame touch position data and has 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 an electronic device selected from the group consisting of a flat panel 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, a desktop computer, a laptop computer, an all-in-one computer, a financial transaction device, and an access control device.

In order to enable the Review Committee to further understand the structure, features, purpose, and advantages of the present invention, the following are attached with drawings and detailed descriptions of preferred specific embodiments.

FIG4 shows a block diagram of an electronic device to which a finger tracking correction method of the present invention is applied. As shown in FIG4 , the electronic device 1 has a touch function and includes a touch device 11 and a processor 12, wherein the touch device 11 includes a touch panel 111 and an electronic chip 112 for performing touch sensing control, such as a touch chip or a touch and display driver integration (TDDI) chip. To explain in more detail, in some special application environments, the user may 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 at the same time to ensure that the multiple lines are correctly reported. It should be noted that "reporting" refers to uploading the relevant touch sensing data of the multiple lines to the processor 12 of the electronic device 1. Specifically, as shown in Figure 4, a finger tracking algorithm is integrated into the electronic chip 112 of the touch device 11, thereby serving as a finger tracking unit 113. When tracking multiple fingers, the finger tracking unit 113 will assign a number to each finger to track the position of the finger in real time, so that the touch device 11 can correctly report multiple lines.

As shown in FIG4 , the finger tracking calibration method of the present invention is also integrated into the electronic chip 112, thereby serving as a finger tracking calibration unit 114. The finger tracking calibration method of the present invention is executed by the electronic chip 112 to calibrate the tracking of each finger of the touch device 11 in real time when multiple fingers draw lines on the screen of the electronic device 1, thereby avoiding the occurrence of crossed lines due to finger tracking errors when multiple fingers draw lines at the same time.

FIG5 shows a flow chart of the finger tracking calibration method of the present invention. As shown in FIG5, after the finger tracking calibration method of the present invention is activated, step S1 is first executed: receiving a previous frame touch sensing data and a current frame touch sensing data. The previous frame touch sensing data includes a plurality of previous frame touch position data, and the current frame touch sensing data includes a plurality of current frame 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 method flow then executes step S2: the current frame touch position data and the previous frame touch position data having the same finger number are matched and drawn into a line segment, so that after completing the matching of a plurality of current frame touch position data and a plurality of previous frame touch position data, a plurality of line segments are drawn. For example, FIG6A shows the touch position data of the previous frame and the current frame sensed by the touch device 11 when two fingers draw a line on the screen. And, FIG6B shows two line segments drawn based on the touch position data of the previous frame and the current frame.

As shown in FIG5 , the method flow then executes 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 executing step S31, a line segment is selected from the plurality of line segments, and it is confirmed whether the two endpoints of the line segment are simultaneously located on the same side of another line segment among the plurality of line segments. Continuing, in step S32, the above steps are repeated until all line segments have completed the line segment intersection detection. For example, the left line segment is selected from the two line segments in FIG6B, and it is confirmed that the two endpoints of the line segment are both located on the same side of the right line segment. Next, select the right line segment from the two line segments in FIG. 6B and make sure that both endpoints of the line segment are located on the same side of the left line segment.

Practical experience indicates that when the finger tracking unit 113 makes an error in assigning the finger number in the process of switching from the previous frame to the current frame, multiple lines displayed on the screen of the electronic device 1 will cross each other. FIG6C shows two line segments drawn based on the touch position data of the previous frame and the current frame. As shown in FIG6C, when the finger number assignment is incorrect, that is, the data belonging to finger A is assigned to finger number B or the data belonging to finger B is assigned to finger number A, the two line segments will cross each other.

As shown in FIG. 5 , in step S4 of the method of the present invention, if there is a line segment intersection, 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. According to the design of the present invention, the finger number correction operation includes detailed steps S41 to S43. When executing 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.

To explain in more detail, the first grouping operation includes: detailed steps S411 to S415. When executing steps S411 to S412, the current frame touch position data or the previous frame touch position data whose position is the bottom and the leftmost is first used as a scanning reference point, and then the vector angle (or polar angle) between the scanning reference point and the other current frame touch position data and the other previous frame touch position data is calculated. Figure 7A shows the touch position data of the previous frame and the current frame sensed by the touch device 11 when four fingers draw a line on the screen. And, Figure 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 the leftmost position is a circular data point, which belongs to the touch position data of the previous frame. In addition, Fig. 7B also exemplarily shows the vector angle between this touch point as a scanning reference point and other touch points.

As shown in FIG7C , the first grouping operation is to execute steps S413 to S414, and scan the corresponding current frame touch position data and the previous frame touch position data according to the size of each vector angle, and stop scanning when the current frame touch position data and the previous frame touch position data obtained by scanning have the same quantity. In FIG7C , after scanning from small to large according to the vector angle, two current frame touch position data and two previous frame touch position data are obtained, and at this time, it has met the situation that the current frame touch position data and the previous frame touch position data have the same quantity, so the scanning is stopped. Continuing, as shown in FIG. 7D , the first grouping operation is followed by executing step S415, where the current frame touch position data and the previous frame touch position data obtained by scanning are grouped into the first data group, and the other current frame touch position data and the previous frame touch position data are grouped into the second data group.

After completing the detailed steps S411 to S415 of step S41, step S42 is then executed to perform at least one second grouping operation on the first data group, so that at least one current frame touch position data and at least one previous frame touch position data are matched with each other, and the matched current frame touch position data and the previous frame touch position data have the same finger number. According to the design of the present invention, the second grouping operation also includes detailed steps S421 to S425. When executing steps S421 to S423, as shown in FIG8A, the current frame touch position data or the previous frame touch position data whose position is at the bottom and the leftmost is first used as a scanning reference point, and then the vector angle between the scanning reference point and other current frame touch position data and other previous frame touch position data is calculated, and then the corresponding current frame touch position data and the previous frame touch position data are scanned according to the size of each vector angle.

As shown in FIG8B , the second grouping operation is to execute 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 and the previous frame touch position data are matched with each other, and the matched current frame touch position data and the previous frame touch position data have the same finger number. It is worth mentioning that in FIG. 8B , a thick black line is used to connect a circular touch point and an X-shaped touch point, indicating that the two touch points are paired with each other. Therefore, the paired X-shaped touch point (i.e., the current frame touch position data) and the circular touch point (i.e., the previous frame touch position data) have the same finger number, completing the finger number correction (or reallocation of corresponding finger numbers).

As shown in FIG8C , the second grouping operation is to execute step S425, and execute steps S421 to S424 (i.e., pairing procedure) as described above for the other current frame touch position data and the previous frame touch position data, until each current frame touch position data is paired with a corresponding previous frame touch position data and has the same finger number. Therefore, in FIG8C , another thick black line is used to connect a circular touch point and an X-shaped touch point, indicating that the two touch points are paired with each other, so the paired X-shaped touch point (i.e., current frame touch position data) and the circular touch point (i.e., previous frame touch position data) have the same finger number, and the finger number correction (or reallocation of corresponding finger numbers) is completed.

After completing the detailed steps S421 to S425 of step S42, step S43 is then executed to perform the second grouping operation on the second data group at least once, so as to match 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 matched current frame touch position data and the previous frame touch position data have the same finger number. Similarly, when the second grouping operation first executes steps S421 to S423, as shown in Figure 9A, the current frame touch position data or the previous frame touch position data whose position is at the bottom and leftmost is used as a scanning reference point, and then the vector angle between the scanning reference point and other current frame touch position data and other previous frame touch position data is calculated, and then the corresponding current frame touch position data and the previous frame touch position data are scanned according to the size of each vector angle. Continuing, as shown in FIG9B , the second grouping operation is to execute 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 and the previous frame touch position data are matched with each other, and the matched current frame touch position data and the previous frame touch position data have the same finger number. It is worth mentioning that in FIG. 9B , a thick black line is used to connect a circular touch point and an X-shaped touch point, indicating that the two touch points are paired with each other. Therefore, the paired X-shaped touch point (i.e., the current frame touch position data) and the circular touch point (i.e., the previous frame touch position data) have the same finger number, completing the finger number correction (or reallocation of corresponding finger numbers).

As shown in FIG9C , the second grouping operation is to execute step S425, and execute steps S421 to S424 (i.e., pairing procedure) as described above for the other current frame touch position data and the previous frame touch position data, until each current frame touch position data is paired with a corresponding previous frame touch position data and has the same finger number. Therefore, in FIG9C , another thick black line is used to connect a circular touch point and an X-shaped touch point, indicating that the two touch points are paired with each other, so the paired X-shaped touch point (i.e., current frame touch position data) and the circular touch point (i.e., previous frame touch position data) have the same finger number, and the finger number correction (or reallocation of corresponding finger numbers) is completed.

In summary, the present invention discloses a finger tracking calibration method, which is applied to an electronic device 1 having a touch device 11 and is executed by an electronic chip 112 of the electronic device 1. When the finger tracking calibration method of the present invention is applied, the electronic chip 112 executes: during the finger drawing process, detecting whether the finger number corresponding to each line is correct; and when the finger number is incorrect, executing a finger number calibration operation. Therefore, when the finger tracking correction method of the present invention is applied, the electronic chip 112 can calibrate 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, thereby avoiding the phenomenon that multiple drawing tracks displayed on the screen cross each other due to finger tracking errors when multiple fingers draw lines at the same time. For example, FIG. 10 shows that the two tracks drawn by two fingers on the screen do not cross each other. For another example, FIG. 3 shows that the three tracks drawn by three fingers on the screen do not cross each other. That is, the finger tracking correction method of the present invention can solve the problem of misjudgment of the trajectory of multi-finger drawing, and its characteristics include the following steps: (1) reading a first set of numbers of multiple previous frame touch points, and performing a touch point numbering procedure on multiple current frame touch points according to a predetermined rule to obtain a second set of numbers of the current frame touch points; (2) connecting a previous frame touch point and a current frame touch point corresponding to each identical number in the first set of numbers and the second set of numbers into a line segment; and (3) performing a number correction operation on the current frame touch points to update the second set of numbers when any two of the line segments intersect. In addition, the predetermined rule may be to increase the number from left to right or from right to left. For example, assuming there are 5 touch points, the 5 touch points may be numbered 1, 2, 3, 4 and 5 in sequence from left to right.

Thus, the finger tracking calibration method of the present invention has been fully and clearly described above; and, from the above, it can be known that the present invention has the following advantages:

(1) The present invention discloses a finger tracking calibration method, which is applied to an electronic device having a touch device and is executed by a touch chip or a TDDI chip of the electronic device. When multiple fingers draw lines on the screen of the electronic device, the touch device can calibrate the tracking of each finger in real time, thereby avoiding the occurrence of crossed lines due to finger tracking errors when multiple fingers draw lines at the same time.

(2) The present invention also provides an electronic chip for use in an electronic device with a touch function, wherein the electronic chip executes the finger tracking correction method of the present invention as described above when multiple fingers draw lines on the screen of the electronic device, so that the electronic chip can calibrate the tracking of each finger of the touch device in real time when multiple fingers draw lines on the screen of the electronic device, thereby avoiding the phenomenon that multiple lines displayed on the screen cross each other due to finger tracking errors when multiple fingers draw lines at the same time.

(3) In addition, the present invention also provides various information processing devices, which are characterized by having the electronic chip of the present invention as described above. In one embodiment, the information processing device is an electronic device selected from the group consisting of 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, a desktop computer, a laptop computer, an all-in-one computer, a financial transaction device, and a door access control device.

It must be emphasized that what is disclosed in the above-mentioned case is a preferred embodiment. Any partial changes or modifications that are derived from the technical ideas of this case and are easily inferred by people familiar with the art do not deviate from the scope of the patent rights of this case.

In summary, this case shows that its purpose, means and effects are very different from the known technology, and it is the first invention that is practical and indeed meets the patent requirements for invention. We sincerely request the review committee to examine this carefully and grant a patent as soon as possible to benefit the society. This is our utmost prayer.

1a: electronic device 11a: touch device 111a: touch panel 112a: electronic chip 111a: touch panel 113a: finger tracking unit 12a: processor 1: electronic device 11: touch device 111: touch panel 112: electronic chip 111: touch panel 113: finger tracking unit 114: finger tracking correction unit 12: processor unit S1: receiving 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 a line segment, so that after completing the pairing of the multiple current frame touch position data and the multiple previous frame 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 multiple line segments S4: In the case of line segment intersection, perform a finger number correction operation on the multiple current frame touch position data and the multiple previous frame touch position data

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

S1: Receive the previous frame of touch sensing data and the 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 a line segment, so that after completing the pairing of multiple current frame touch position data and multiple previous frame 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 multiple line segments

S4: In the case of line segment intersection, a finger number correction operation is performed on the multiple current frame touch position data and the multiple previous frame touch position data

Claims (14)

A finger tracking calibration 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 calibration method includes: Receiving a previous frame touch sensing data and a 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 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 and the previous frame touch position data having the same finger number are matched and drawn into a line segment, so that after the matching of the plurality of current frame touch position data and the plurality of previous frame touch position data is completed, a plurality of line segments are drawn; A line segment crossing detection operation is performed to confirm whether there is a line segment crossing among the plurality of line segments; and If there is a line segment crossing, 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. The finger tracking calibration method as described in claim 1, wherein the line segment intersection detection operation includes the following steps: Selecting a line segment from the plurality of line segments and confirming whether the two end points of the line segment are simultaneously located on the same side of another line segment in the plurality of line segments; and Repeating the above steps until all line segments have completed the line segment intersection detection. The finger tracking correction method as described in 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 separating a first data group and a second data group; Performing at least one second grouping operation on the first data group, thereby matching at least one current frame touch position data and at least one previous frame touch position data, and making the matched current frame touch position data and the previous frame touch position data have the same finger number; and Perform the second grouping operation on the second data group at least once, so as to match at least one of the current frame touch position data and at least one of the previous frame touch position data, and make the matched current frame touch position data and the previous frame touch position data have the same finger number. The finger tracking correction method as described in claim 3, wherein the first grouping operation includes the following steps: Taking the current frame touch position data or the previous frame touch position data with its position at the bottom and the leftmost as a scanning reference point; Calculating the vector angle (or polar angle) between the scanning reference point and other current frame touch position data and other previous frame touch position data; Scanning the corresponding current frame touch position data and previous frame touch position data according to the size of each vector angle; Stop scanning when the current frame touch position data and the previous frame touch position data obtained by scanning have the same amount; and The current frame touch position data and the previous frame touch position data obtained by scanning are classified into the first data group, and the other current frame touch position data and the previous frame touch position data are classified into the second data group. The finger tracking correction method as described in claim 4, wherein the second grouping operation includes the following steps: Taking the current frame touch position data or the previous frame touch position data with its position at the bottom and the leftmost as a scanning reference point; Calculating the vector angle between the scanning reference point and other current frame touch position data and other previous frame touch position data; Scanning the corresponding current frame touch position data and previous frame touch position data according to the size of each vector angle; When the number of the current frame touch position data and the previous frame touch position data obtained by scanning is 1, the current frame touch position data and the previous frame touch position data are matched with each other, and the matched current frame touch position data and the previous frame touch position data have the same finger number; and The above-mentioned multiple steps are performed on other current frame touch position data and the previous frame touch position data until each current frame touch position data is matched with a corresponding one of the previous frame touch position data and has the same finger number. 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: reading a first set of numbers of a plurality of previous frame touch points, and performing a touch point numbering procedure on a plurality of current frame touch points according to a predetermined rule to obtain a second set of numbers of the current frame touch points; connecting a previous frame touch point and a current frame touch point corresponding to each of the same numbers in the first set of numbers and the second set of numbers into a line segment; and performing a number correction operation on the current frame touch points to update the second set of numbers when any two of the line segments intersect. An electronic chip is applied to an electronic device with a touch function, wherein the electronic chip executes a finger tracking correction method when a plurality of fingers draw lines on the screen of the electronic device; the finger tracking correction method comprises: Receiving a previous frame touch sensing data and a current frame touch sensing data, wherein the previous frame touch sensing data comprises a plurality of previous frame touch position data, the current frame touch sensing data comprises a plurality of current frame 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 and the previous frame touch position data having the same finger number are matched and drawn into a line segment, so that after the matching of the plurality of current frame touch position data and the plurality of previous frame touch position data is completed, a plurality of line segments are drawn; A line segment crossing detection operation is performed to confirm whether there is a line segment crossing among the plurality of line segments; and If there is a line segment crossing, 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. An electronic chip as described in claim 7, wherein the electronic chip is a touch chip or a touch display driver integrated chip. An electronic chip as described in claim 7, wherein the line segment intersection detection operation includes the following steps: Selecting a line segment from the plurality of line segments and confirming whether the two end points of the line segment are simultaneously located on the same side of another line segment in the plurality of line segments; and Repeating the above steps until all line segments have completed the line segment intersection detection. The electronic chip as described in claim 7, 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 separating a first data group and a second data group; Performing at least one second grouping operation on the first data group, thereby matching at least one current frame touch position data and at least one previous frame touch position data, and making the matched current frame touch position data and the previous frame touch position data have the same finger number; and Perform the second grouping operation on the second data group at least once, so as to match at least one of the current frame touch position data and at least one of the previous frame touch position data, and make the matched current frame touch position data and the previous frame touch position data have the same finger number. The electronic chip as described in claim 10, wherein the first grouping operation includes the following steps: Taking the current frame touch position data or the previous frame touch position data with its position at the bottom and the leftmost as a scanning reference point; Calculating the vector angle (or polar angle) between the scanning reference point and other current frame touch position data and other previous frame touch position data; Scanning the corresponding current frame touch position data and previous frame touch position data according to the size of each vector angle; Stop scanning when the current frame touch position data and the previous frame touch position data obtained by scanning have the same quantity; and The current frame touch position data and the previous frame touch position data obtained by scanning are classified into the first data group, and the other current frame touch position data and the previous frame touch position data are classified into the second data group. The electronic chip as described in claim 11, wherein the second grouping operation includes the following steps: Taking the current frame touch position data or the previous frame touch position data with its position at the bottom and the leftmost as a scanning reference point; Calculating the vector angle between the scanning reference point and other current frame touch position data and other previous frame touch position data; Scanning the corresponding current frame touch position data and previous frame touch position data according to the size of each vector angle; When the number of the current frame touch position data and the previous frame touch position data obtained by scanning is 1, the current frame touch position data and the previous frame touch position data are matched with each other, and the matched current frame touch position data and the previous frame touch position data have the same finger number; and The above-mentioned multiple steps are performed on other current frame touch position data and the previous frame touch position data until each current frame touch position data is matched with a corresponding one of the previous frame touch position data and has the same finger number. An electronic chip is applied to an electronic device with a touch function, wherein the electronic chip executes a finger tracking correction method when a plurality of fingers draw lines on the screen of the electronic device; the finger tracking correction method comprises: reading a first set of numbers of a plurality of previous frame touch points, and performing a touch point numbering procedure on a plurality of current frame touch points according to a predetermined rule to obtain a second set of numbers of the current frame touch points; connecting a previous frame touch point and a current frame touch point corresponding to each of the same numbers in the first set of numbers and the second set of numbers into a line segment; and When any two of the line segments intersect, a number correction operation is performed on the current frame touch points to update the second set of numbers. An information processing device is characterized by having at least one electronic chip as described in claim 7 to claim 13.

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