CN111837095A - Active Pen - Google Patents

Abstract

The application provides an initiative pen, the accuracy that the nib coordinate of initiative pen detected when can promoting the body slope of a writing brush. The active pen comprises: a pen body housing; and the first driving electrode comprises a connecting rod arranged in the middle of the pen body shell and a head arranged at one end of a pen point of the connecting rod, wherein a first structural member is arranged between the pen body shell and the connecting rod, the head of the first driving electrode is hemispherical, the radius of the head of the first driving electrode is larger than or equal to a first threshold value, the diameter of the connecting rod is smaller than or equal to a second threshold value, and the second threshold value is smaller than or equal to the first threshold value.

Description

Active Pen

technical field

The embodiments of the present application relate to the field of touch technology, and more particularly, to an active pen.

Background technique

At present, the active pen, as the main peripheral input accessory of electronic equipment, has gradually attracted the attention of the market. The pen tip electrode of the active pen will output a driving signal, and a certain number of horizontal and vertical detection electrodes are distributed on the touch screen, so the driving signal output by the pen tip can be detected through the detection electrodes, and the pen tip 2D position coordinates on the touch screen. However, when the active pen is writing, the inclination of the pen body will affect the accuracy of the coordinates of the pen tip.

SUMMARY OF THE INVENTION

The embodiments of the present application provide an active pen, which can improve the accuracy of detecting the coordinates of the pen tip of the active pen when the pen body is tilted.

In a first aspect, an active pen is provided, including:

the pen body; and,

The first driving electrode includes a connecting rod disposed in the middle of the pen body shell, and a head disposed at one end of the pen tip of the connecting rod, and a first structure is disposed between the pen body shell and the connecting rod The head of the first driving electrode is hemispherical and the radius is greater than or equal to the first threshold value, the diameter of one end of the pen tip of the connecting rod is less than or equal to the second threshold value, and the second threshold value is less than or equal to the the first threshold.

In a possible implementation manner, the first threshold value is greater than or equal to 0.3 mm.

In a possible implementation manner, the radius of the head of the first driving electrode is also smaller than or equal to the fifth threshold.

In a possible implementation manner, the fifth threshold is less than or equal to 0.8 mm.

In a possible implementation manner, the second threshold value is less than or equal to 3 mm, for example, the second threshold value is equal to 0.3 mm.

In a possible implementation manner, the connecting rod extends out of the pen body shell, so that the head of the first driving electrode is exposed.

In a possible implementation manner, the active pen further includes a pen tip housing, wherein the connecting rod extends to the pen tip housing, so that the head of the first driving electrode is accommodated in the pen tip housing.

In a possible implementation manner, the thickness of the pen tip housing at the head of the first driving electrode is less than or equal to a third threshold.

In a possible implementation manner, the third threshold is less than or equal to 3 mm, for example, the third threshold is equal to 0.3 mm.

In a possible implementation manner, the first structural member extends into the pen tip housing.

In a possible implementation manner, a second structural member is disposed between the pen body shell and the first structural member, and the part of the first structural member close to the pen tip is not connected to the second structural member overlapping.

In a possible implementation manner, the active pen further includes:

an isolation electrode, disposed on a portion of the first structural member close to the pen tip; and,

The second driving electrode is disposed on the second structural member.

In a possible implementation manner, the active pen further includes:

The isolation electrode is arranged on the part of the first structural member close to the tip of the pen.

In a possible implementation manner, the distance between the isolation electrode and the head of the first driving electrode is less than or equal to a fourth threshold.

In a possible implementation manner, the active pen further includes:

an isolation electrode, disposed on the second structural member; and,

The second driving electrode is arranged on the portion of the first structural member close to the pen tip.

In a possible implementation manner, the active pen further includes:

The second driving electrode is arranged on the portion of the first structural member close to the pen tip.

In a possible implementation manner, the distance between the second driving electrode and the head of the first driving electrode is less than or equal to a fourth threshold.

In a possible implementation manner, the fourth threshold is less than or equal to 10 mm, for example, the fourth threshold is equal to 2 mm.

In a possible implementation manner, the first driving electrodes are used to output a first driving signal to the touch screen, and the first driving signal is used to calculate the position coordinates of the pen tip on the touch screen.

In a possible implementation manner, the second driving electrodes are used for outputting a second driving signal to the touch screen, and the second driving signal is used for determining the inclination angle of the active pen relative to the touch screen.

In a possible implementation manner, the isolation electrodes are used to isolate interference signals of the first driving electrodes.

Based on the above technical solutions, the head of the first driving electrode is set to a hemispherical shape to lower the geometric center of the head of the first driving electrode, so that the head of the first driving electrode is as close to the touch screen as possible; The radius of the head of the electrode is greater than or equal to the first threshold to ensure the strength of the driving signal of the pen tip; and the diameter of one end of the pen tip of the connecting rod of the first driving electrode is less than or equal to the second threshold to reduce the driving signal of the metal link to the driving signal. Impact. In this way, when the active pen is inclined to write on the touch screen, the influence of the inclination of the pen body on the detection of the coordinates of the pen tip can be effectively reduced.

Description of drawings

FIG. 1 is a schematic diagram of the coordinate position detection of the active pen.

FIG. 2 is a schematic diagram of a pen tip structure of the active pen 100 .

FIG. 3 is a schematic diagram of a detection result when the pen body of the active pen 100 is perpendicular to the touch screen.

FIG. 4 is a schematic diagram of a detection result when the pen body of the active pen 100 is inclined relative to the touch screen.

FIG. 5 is a schematic diagram illustrating the corresponding change in coupling capacitance of the active pen 100 under different tilt angles.

FIG. 6 is a schematic diagram of a pen tip structure of an active pen 600 according to an embodiment of the present application.

FIG. 7 is a schematic diagram illustrating the corresponding change in coupling capacitance of the active pen 600 under different tilt angles.

FIG. 8 is a schematic diagram of a pen tip structure of an active pen 600 according to another embodiment of the present application.

FIG. 9 is a schematic diagram of a pen tip structure of an active pen 600 according to another embodiment of the present application.

FIG. 10 is a schematic diagram of a pen tip structure of an active pen 600 according to another embodiment of the present application.

FIG. 11 is a schematic diagram of a pen tip structure of an active pen 600 according to another embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of the coordinate position detection of the active pen 100 . The detection system of the capacitive active pen mainly includes the active pen 100 and the touch screen 200 . The active pen 100 has pen tip drive electrodes. The electrode can emit a driving signal, which can also be called an excitation signal or a coding signal. The touch screen 200 is provided with row electrodes and column electrodes. The plurality of row electrodes and the plurality of column electrodes constitute electrode arrays in the Y direction and the X direction, respectively. When the pen tip driving electrode of the active pen 100 emits a driving signal, the coupling capacitance formed between the electrode and the row electrode of the touch screen and the coupling capacitance formed between the electrode and the column electrode of the touch screen will change. By detecting the coupling capacitance , the coordinates of the active pen in the X direction and the Y direction can be determined, so as to finally determine the position of the pen tip of the active pen on the touch screen.

FIG. 2 is a schematic diagram of a pen tip structure of the active pen 100 . As shown in FIG. 2 , the active pen 100 includes a driving electrode 110 , an isolation electrode 120 , a structural member 130 , a driving electrode 140 , a structural member 150 , a pen tip housing 160 and a pen body housing 170 . The head of the driving electrode 110 is tapered. The head of the driving electrode 110 is wrapped by a nib housing 160, which is an insulating material, such as silicone or plastic. The isolation electrode 120 is disposed on the structural member 130, and the structural member 130 is an insulating material, such as plastic. The isolation electrode 120 is generally connected to the circuit reference ground of the active pen, and its function is to isolate the driving electrode 110 and the driving electrode 140 . The driving electrodes 140 are disposed on the structural member 150, and the structural member 150 is an insulating material, such as plastic. The driving electrode 110 , the isolation electrode 120 and the driving electrode 140 are enclosed by the pen tip housing 160 and the pen body housing 170 . The driving electrodes 110 and 140 are combined together and can be used to detect the gesture of the active pen. Wherein, the driving electrode 110 can transmit a driving signal to the outside, so as to calculate the position coordinates of the pen tip of the active pen based on the principle shown in FIG. 1 . The driving electrodes 140 can also transmit driving signals outward. When the pen body of the active pen 100 is tilted, the driving signals transmitted by the driving electrodes 140 are used to calculate the inclination angle of the active pen 100 . According to the tilt angle, the touch screen 200 can present a handwriting shape matching the tilt degree to the user, thereby improving user experience.

However, when the active pen 100 is tilted, the calculation of the position coordinates of the pen tip of the active pen 100 may be affected. The following description will be made with reference to FIG. 3 and FIG. 4 . 3 and 4 both show three adjacent receiving channels, hereinafter referred to as channels. The channel S1 , the channel S3 and the channel S2 may be, for example, three adjacent row electrodes or three adjacent column electrodes on the touch screen in FIG. 1 . As shown in FIG. 3 , when the pen body of the active pen 100 is perpendicular to the surface of the cover plate 210 of the touch screen 200, since the contact point between the pen tip and the cover plate 210 is located directly above the channel S2, at this time, the driving electrode 110 and the channel S1 The coupling capacitance C1 between them is equal to the coupling capacitance C3 between the driving electrode 110 and the channel S3. The coupling capacitance C2 between the driving electrode 110 and the channel S2 is larger than the coupling capacitance C1 and the coupling capacitance C3. At this time, the coordinates of the pen tip obtained by the touch screen 200 are located just above the channel S2, which is consistent with the actual position of the pen tip.

However, when the pen body of the active pen 100 is inclined, as shown in FIG. 4 , the driving electrode 110 is more inclined to the side of the channel S3 . Therefore, the coupling capacitance C1' between the driving electrode 110 and the channel S1 is smaller than the corresponding coupling capacitance C1 when the pen body is vertical as shown in FIG. 3, and the coupling capacitance C3' between the driving electrode 110 and the channel S3, It is larger than the corresponding coupling capacitance C3 when the pen body shown in Figure 3 is vertical. At this time, the coordinate position of the pen tip calculated according to the coupling capacitance will be shifted to the right, that is, to the side of the channel S3, while the actual position of the pen tip is located directly above the channel S2, which results in the pen tip calculated when the active pen 100 is tilted. The coordinates do not match the actual pen tip position, which affects the user experience.

With respect to FIG. 4 , the detected coupling capacitance when the pen body is tilted is simulated, and the change of the coupling capacitance shown in FIG. 5 is obtained. 5 shows the change of the coupling capacitance between the driving electrode 110 and the channel S1 , the channel S2 and the channel S3 respectively when the active pen 100 and the cover plate 210 are at different angles. It can be seen that when the inclination angle of the active pen 100 is 90°, that is, when the active pen 100 is perpendicular to the cover plate 210 , the coupling capacitance C1 of the channel S1 and the coupling capacitance C3 of the channel S3 are equal, and when the inclination angle of the active pen 100 is equal to the coupling capacitance C1 of the channel S1 and the coupling capacitance C3 of the channel S3 At 60°, 45° and 30° respectively, the coupling capacitance C1 between the driving electrode 110 and the channel S1 gradually decreases, while the coupling capacitance C3 between the driving electrode 110 and the channel S3 increases rapidly. It can be seen that the more the pen body is tilted, the greater the difference between the calculated pen tip coordinate position and the actual position of the pen tip.

To this end, the embodiments of the present application improve and optimize the pen tip structure, which improves the accuracy of pen tip coordinate detection when the pen body is tilted.

FIG. 6 is a schematic structural diagram of an active pen 600 according to an embodiment of the present application. As shown in FIG. 6, the active pen 600 includes:

Pen body housing 670; and,

The first driving electrode 610 includes a connecting rod disposed in the middle of the pen body shell 670, and a head disposed at one end of the pen tip of the connecting rod. A first structural member 630 is disposed between the pen body shell 670 and the connecting rod. The head of the first driving electrode 610 is hemispherical.

In this embodiment, the radius A of the head of the first driving electrode 610 is greater than or equal to the first threshold, the diameter D of the tip end of the connecting rod of the first driving electrode 610 is less than or equal to the second threshold, and the second threshold is less than or equal to the first threshold.

Since the head of the first driving electrode 610 is changed from a conical shape to a hemispherical shape, the geometric center of the head of the first driving electrode 610 is greatly reduced, so that the head of the first driving electrode 610 is as close to the touch screen as possible. When the pen body is tilted, the geometric center position of the head of the first driving electrode 610 will not move greatly, thereby reducing the offset of the coordinate position of the pen tip when the pen body is tilted.

The radius A of the head of the first driving electrode 610 may be set to be greater than or equal to the first threshold to ensure that the driving signal emitted by the first driving electrode 610 has sufficient strength. For example, the first threshold is greater than or equal to 0.3 mm.

The head of the first drive electrode 610 is located at the end of the connecting rod close to the pen tip, and the diameter D of the tip end of the connecting rod is less than or equal to the second threshold, so as to reduce the effect of the signal radiated on the metal connecting rod to the head of the first drive electrode 610 The drive signal emitted from the part will be affected. The second threshold is, for example, less than or equal to 3 mm, preferably, the second threshold is equal to 0.3 mm. In this way, by enhancing the strength of the driving signal emitted by the head of the first driving electrode 610 and reducing the strength of the interference signal introduced by the connecting rod, the accuracy of the detection of the coordinates of the pen tip is further improved.

Further, the radius A of the head of the first driving electrode 610 may also be set to be less than or equal to a fifth threshold, and the fifth threshold may be, for example, less than or equal to 0.8 mm. Preferably, the radius A of the head of the first driving electrode 610 satisfies: 0.3 mm≤A≤0.8 mm.

In this way, by setting the shape of the head of the first driving electrode 610 of the active pen to a hemispherical shape, and setting the radius of the head and the diameter of the connecting rod within a reasonable range, it is possible to effectively reduce the inclination of the pen body. Influence on pen tip coordinate detection.

It should be understood that the above-mentioned hemisphere may refer to half of the sphere, or more than half of the sphere, or less than half of the sphere, as long as the head of the first driving electrode 610 includes at least a partial area of a sphere.

Referring to FIG. 4 , when the pen body is tilted, the coupling capacitance between the first driving electrode 610 and the receiving channel of the touch screen 200 is simulated, and the variation of the coupling capacitance shown in FIG. 7 is obtained. FIG. 7 shows the variation of the coupling capacitance between the first driving electrode 610 and the channel S1 , the channel S2 and the channel S3 when the active pen 600 and the cover plate 210 are at different angles. It can be seen that when the inclination angle of the active pen 600 is 90°, that is, when the active pen 600 is perpendicular to the cover plate 210, the coupling capacitance C1 of the channel S1 and the coupling capacitance C3 of the channel S3 are equal, and when the inclination angle of the active pen 600 is equal to the coupling capacitance C1 of the channel S1 and the coupling capacitance C3 of the channel S3 At 60°, 45° and 30° respectively, the coupling capacitance C1 between the first driving electrode 610 and the channel S1 gradually decreases, while the coupling capacitance C3 between the first driving electrode 610 and the channel S3 gradually increases. However, after comparing the detection structures of the active pen 600 shown in FIG. 7 and the active pen 100 shown in FIG. 5 , it can be found that the influence of the inclination of the active pen 600 on the coupling capacitance C1 and the coupling capacitance C3 is significantly smaller than that of the active pen 100 Influence on coupling capacitor C1 and coupling capacitor C3. The improved first drive electrode 610 makes the change amplitude of the coupling capacitance between it and the channel S1, the channel S2 and the channel S3 significantly reduced, that is to say, when the pen body is tilted, the pen tip coordinates will not change greatly. offset.

In this embodiment of the present application, the active pen 600 may further include a pen tip housing 660 . The connecting rod of the first driving electrode 610 may extend to the pen tip housing 660, so that the head of the first driving electrode 610 is accommodated in the pen tip housing 660; The connecting rod extends out of the pen body casing 670 to expose the head of the first driving electrode 610 .

The active pen 600 shown in FIG. 6 includes a tip housing 660 . The pen tip housing 660 can be integrally formed with the pen body housing 670; as shown in FIG. 6, the pen tip housing 660 and the pen body housing 670 can be used as two independent parts, wherein the pen tip housing 660 can be installed on the pen body housing 670, and can be flexibly disassembled from the pen body shell 670 to facilitate the maintenance and replacement of the first driving electrode 610.

When the pen tip housing 660 is provided in the active pen 600, the thickness B of the pen tip housing 660 at the head of the first driving electrode 610 is less than or equal to the third threshold. The third threshold is, for example, less than or equal to 3 mm, preferably, the third threshold is 0.3 mm. The pen tip housing 660 may block the driving signal emitted by the first driving electrode 610. Therefore, limiting the thickness of the pen tip housing 660 can reduce the blocking caused by the driving signal emitted by the first driving electrode 610, and improve the detection efficiency of the touch screen 200. The strength of the signal improves the accuracy of pen tip position detection.

The first structural member 630 plays a role of supporting and fixing. Optionally, the first structural member 630 may extend into the nib housing 660, such as shown in FIG. 6 . However, the embodiment of the present application does not limit this, and the first structural member 630 may only be wrapped in the pen body shell 670 .

Optionally, as shown in FIG. 6 , a second structural member 650 may also be disposed between the pen body shell 670 and the first structural member 630 . The second structural member 650 plays the role of supporting and fixing. The portion of the first structural member 630 close to the pen tip does not overlap with the second structural member 650 . That is, the first structural member 630 protrudes from the second structural member 650 at an end close to the pen tip, so as not to be covered by the second structural member 650 . The portion of the first structural member 630 near the tip of the pen can be used for setting driving electrodes or isolation electrodes.

Optionally, as shown in FIG. 6 , the active pen 600 further includes a second driving electrode 640 and an isolation electrode 620 . The driving signal output by the first driving electrode 610 to the touch screen is used to calculate the position coordinates of the pen tip on the touch screen 200 . The driving signal output by the second driving electrode to the touch screen is used to calculate the inclination angle of the active pen 600 relative to the touch screen. The isolation electrode 620 may be used to isolate signal interference between the first driving electrode 610 and the second driving electrode 640 . In addition, the isolation electrode 620 in the embodiment of the present application can also isolate a part of the signal radiated from the connecting rod of the first driving electrode 610 .

The second driving electrodes 640 may be disposed on the second structural member 650 . The isolation electrode 620 may be disposed on a portion of the first structure member 630 near the tip of the pen. Wherein, the distance C between the isolation electrode 620 and the head of the first driving electrode 610 is less than or equal to the fourth threshold. By reducing the distance C between the isolation electrode 620 and the head of the first driving electrode 610, the isolation effect of the interference signal is strengthened, and the driving force emitted by other electrodes or lines to the head of the first driving electrode 610 is reduced as much as possible. the effect of the signal. The fourth threshold is, for example, less than or equal to 10 mm, preferably, the fourth threshold is equal to 2 mm.

The active pen 600 shown in FIG. 6 is only an example, and the active pen 600 in this embodiment of the present application may also have other deformed structures.

For example, as shown in FIG. 8 , the active pen 600 may not be provided with a pen tip casing 660 to prevent the pen tip casing 660 from blocking the driving signal emitted by the head of the first driving electrode 610 . At this time, compared with FIG. 6 , the aforementioned components 620 to 650 are all accommodated in the pen body casing 670 , and only the head of the first driving electrode 610 and part of the connecting rod are exposed to the air.

In this embodiment of the present application, the second driving electrodes 640 and the isolation electrodes 620 may also be disposed at other positions, and the active pen may not include the second driving electrodes 640 or the isolation electrodes 620 .

For example, as shown in FIG. 9, the active pen 600 includes a second driving electrode 640 and an isolation electrode 620, but the positions of the second driving electrode 640 and the isolation electrode 620 shown in FIG. The positions of the isolation electrodes 620 are different. In FIG. 9 , the isolation electrode 620 is disposed on the second structural member 650 , and the second driving electrode 640 is disposed on the portion of the first structural member 630 close to the pen tip. At this time, the isolation electrode 620 can be used to isolate the signal interference caused by the circuit board in the active pen to the first driving electrode 610 and the second driving electrode 640 . The distance between the second driving electrode 640 and the head of the first driving electrode 610 is smaller than the above-mentioned fourth threshold, so that the second driving electrode 640 will not be too far away from the touch screen when the active pen is tilted, so as to ensure that the The strength of the valid signal driving electrode 640.

For another example, the isolation electrode 620 shown in FIG. 9 can be removed to form the active pen 600 shown in FIG. 10 . Wherein, the active pen 600 in FIG. 10 does not include the isolation electrode 620 . The second driving electrode 640 is disposed on the portion of the first structural member 630 close to the pen tip. Since the isolation electrode 620 is not provided, the cost of the active pen 600 can be reduced under the condition that the detection accuracy is satisfied.

For another example, the second driving electrode 640 shown in FIG. 9 can be replaced with the isolation electrode 620 to form the active pen 600 shown in FIG. 11 . Wherein, the active pen 600 does not include the second driving electrode 640 . The isolation electrode 620 is disposed on the portion of the first structural member 630 near the tip of the pen. At this time, the active pen 600 does not have functions such as adjusting the shape of handwriting according to the tilt angle, but the cost of the active pen 600 is further reduced. In addition, the isolation electrode 620 can be used to isolate the signal interference caused by the circuit board in the active pen 600 to the first driving electrode 610, so as to improve the accuracy of pen tip position detection.

It should be understood that, for the specific details of other components in the active pen 600 shown in FIGS. 8 to 11 , such as dimensions, reference may be made to the foregoing description of FIG. 6 , which will not be repeated here for brevity.

It should be noted that, on the premise of no conflict, each embodiment described in this application and/or the technical features in each embodiment can be arbitrarily combined with each other, and the technical solution obtained after the combination should also fall within the protection scope of this application .

It should be understood that the specific examples in the embodiments of the present application are only to help those skilled in the art to better understand the embodiments of the present application, rather than limiting the scope of the embodiments of the present application, and those skilled in the art can Various improvements and modifications can be made, and these improvements or modifications all fall within the protection scope of the present application.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (24)

1. An active pen, comprising:

a pen body housing; and the number of the first and second groups,

the first driving electrode comprises a connecting rod arranged in the middle of the pen body shell and a head arranged at one end of a pen point of the connecting rod, wherein a first structural member is arranged between the pen body shell and the connecting rod, the head of the first driving electrode is hemispherical, the radius of the head of the first driving electrode is larger than or equal to a first threshold value, the diameter of one end of the pen point of the connecting rod is smaller than or equal to a second threshold value, and the second threshold value is smaller than or equal to the first threshold value.

2. The active pen of claim 1, wherein the first threshold is greater than or equal to 0.3 millimeters.

3. Active pen according to claim 1 or 2, characterized in that the radius of the head of the first drive electrode is also smaller than or equal to a fifth threshold value.

4. The active pen of claim 3, wherein the fifth threshold is less than or equal to 0.8 millimeters.

5. Active pen according to any of the claims 1 to 4, characterized in that the second threshold is less than or equal to 3 millimeters.

6. Active pen according to claim 5, characterized in that the second threshold value is equal to 0.3 mm.

7. The active pen of any one of claims 1 to 6, wherein the link extends out of the pen body housing such that the head of the first drive electrode is exposed.

8. The active pen of any one of claims 1 to 6, further comprising a tip housing, wherein the linkage extends to the tip housing such that the head of the first drive electrode is contained within the tip housing.

9. The active pen of claim 8, wherein a thickness of the tip housing at the head of the first drive electrode is less than or equal to a third threshold.

10. The active pen of claim 9, wherein the third threshold is less than or equal to 3 millimeters.

11. Active pen according to claim 10, characterized in that the third threshold value is equal to 0.3 mm.

12. The active pen of any one of claims 8 to 11, wherein the first structure extends into the tip housing.

13. The active pen according to any one of claims 1 to 12, wherein a second structure is provided between the body housing and the first structure, and a portion of the first structure near the pen tip does not overlap the second structure.

14. The active pen of claim 13, further comprising:

the isolation electrode is arranged on the part, close to the pen point, of the first structural member; and the number of the first and second groups,

and the second driving electrode is arranged on the second structural part.

15. The active pen of claim 13, further comprising:

and the isolation electrode is arranged on the part, close to the pen point, of the first structural member.

16. The active pen of claim 14 or 15, wherein a distance between the isolated electrode and the head of the first drive electrode is less than or equal to a fourth threshold.

17. The active pen of claim 13, further comprising:

the isolation electrode is arranged on the second structural part; and the number of the first and second groups,

and the second driving electrode is arranged on the part, close to the pen point, of the first structural member.

18. The active pen of claim 13, further comprising:

and the second driving electrode is arranged on the part, close to the pen point, of the first structural member.

19. The active pen of claim 17 or 18, wherein a distance between the second drive electrode and the head of the first drive electrode is less than or equal to a fourth threshold.

20. Active pen according to claim 16 or 19, characterized in that the fourth threshold value is less than or equal to 10 mm.

21. The active pen of claim 20, wherein the fourth threshold is equal to 2 millimeters.

22. The active pen of any one of claims 1 to 21, wherein the first drive electrode is configured to output a first drive signal to a touch screen, the first drive signal being configured to calculate position coordinates of a pen tip on the touch screen.

23. Active pen according to any of claims 14, 17 to 19, characterized in that the second drive electrode is configured to output a second drive signal to the touch screen, the second drive signal being configured to determine the tilt angle of the active pen with respect to the touch screen.

24. The active pen of any one of claims 14 to 17, wherein the isolation electrode is used to isolate the first drive electrode from interfering signals.

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