Active stylus pen tip

Abstract

The present invention discloses a tip of an active stylus pen, comprising a first electrode and a second electrode. The second electrode is disposed on one side of the first electrode and has a first opening and a second opening. The second electrode and the first electrode are arranged along a first direction. The first opening is smaller than the second opening and is located between the first electrode and the second opening. There is a first distance between an end of the first electrode away from the first opening and the first opening. There is a second distance between the first opening and the second opening.

Description

Technical Field

[0001] The invention relates to an active touch pen, and in particular to a pen head of the active touch pen. Background Art

[0002] Active stylus pens have been used in electronic devices with touch screens such as mobile phones and laptops. Active stylus pens can be used to write on the touch screen, and the thickness of the line can be changed by tilting the angle, making the active stylus feel more like a real pen. Summary of the invention

[0003] One of the objectives of the present invention is to provide a pen tip of an active stylus pen.

[0004] According to the present invention, a tip of an active stylus pen includes a first electrode and a second electrode. The second electrode is disposed on one side of the first electrode and has a first opening and a second opening. The second electrode and the first electrode are arranged along a first direction. The first opening is smaller than the second opening and is located between the first electrode and the second opening. There is a first distance between an end of the first electrode away from the first opening and the first opening. There is a second distance between the first opening and the second opening. The first distance is 2.5 mm to 6 mm, and the second distance is 4 mm to 10 mm.

[0005] The pen tip design of the active stylus pen of the present invention allows a touch device (such as a touch screen) that receives input from the stylus pen to more accurately determine the position of the pen tip and the tilt angle of the active stylus pen. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 The first embodiment of the pen tip of the active stylus pen of the present invention is shown.

[0007] Figure 2 An embodiment of determining the tilt angle of an active stylus pen is shown.

[0008] Figure 3 A second embodiment of the pen tip of the active stylus pen of the present invention is shown.

[0009] Figure 4 The third embodiment of the pen tip of the active stylus pen of the present invention is shown.

[0010] Figure 5 A fourth embodiment of the pen tip of the active stylus pen of the present invention is shown.

[0011] Figure 6 A fifth embodiment of the pen tip of the active stylus pen of the present invention is shown.

[0012] Explanation of the accompanying drawings: 10-pen tip; 12-first electrode; 13-rod body; 14-second electrode; 142-first opening; 144-second opening; 20-touch screen; 22-position; 24-position; 30-first downstream signal; 32-second downstream signal; 40-pen tip; 42-third electrode; 422-third opening; 424-fourth opening; 50-pen tip; 60-pen tip; 62-first electrode; 63-rod body; 70-pen tip; 72-first electrode; 73-rod body. DETAILED DESCRIPTION

[0013] Figure 1 The first embodiment of the active stylus pen tip of the present invention is shown. The tip 10 includes a first electrode 12 and a second electrode 14. The second electrode 14 and the first electrode 12 are connected along Figure 1 The second electrode 14 is disposed on one side of the first electrode 12 and does not contact the first electrode 12. The rod body 13 extends Figure 1 The rod 13 extends downward in the middle and is connected to the first electrode 12 through the second electrode 14. The first electrode 12 is used to contact a touch device, such as a touch screen 20. In order to avoid scratching the surface of the touch screen 20, the first electrode 12 may be a conductive plastic. Since the conductive plastic may be worn when the first electrode 12 slides on the touch screen 20, the outside of the first electrode 12 may be covered with an insulator (not shown in the figure) to protect the conductive plastic. In one embodiment, the first electrode 12 may also be a conductive metal. In order to avoid the conductive metal from scratching the surface of the touch screen 20, the outside of the first electrode 12 may be covered with an insulator (not shown in the figure) to protect the touch screen. The rod body 13 may be a conductive plastic, a metal, or a conductive material mixed with conductive plastic and metal. The rod body 13 and the first electrode 12 may be of the same material or different materials. When the rod body 13 and the first electrode 12 are of the same material, the rod body 13 and the first electrode 12 may be integrally formed.

[0014] exist Figure 1 In the embodiment, the second electrode 14 is a ring-shaped electrode and surrounds a portion of the rod body 13. The second electrode 14 has a first opening 142 and a second opening 144, and the first opening 142 is smaller than the second opening 144, that is, the width d1 of the second opening 144 is larger than the width c1 of the first opening. The rod body 13 passes through the first opening 142 and the second opening 144, wherein the first opening 142 is located between the first electrode 12 and the second opening 144. There is a distance a1 between one end of the first electrode 12 away from the first opening 142 and the first opening 142, and there is a distance b1 between the first opening 142 and the second opening 144. In one embodiment, the width d1 of the second opening 144 is smaller than the sum of the width c1 of the first opening 142 and the second distance b1, c1+b1. In the embodiment, the second opening 144 has a width d1 smaller than the sum of the width c1 of the first opening 142 and the second distance b1, c1+b1. Figure 1In the embodiment, the end of the first electrode 12 away from the first opening 142 refers to the lower edge of the first electrode 12 , so the distance a1 is the distance from the lower edge of the first electrode 12 to the first opening 142 .

[0015] The first electrode 12 of the pen tip 10 is used to send a first downlink signal to the touch screen 20. The touch screen 20 receives the first downlink signal to determine the position of the active stylus. The second electrode 14 of the pen tip 10 is used to send a second downlink signal to the touch screen 20. The touch screen 20 receives the first downlink signal and the second downlink signal and determines the tilt angle of the active stylus accordingly. Figure 2 When the tip 10 of the active stylus touches the touch screen 20 to perform an input operation, the first electrode 12 sends a first downlink signal 30 to the touch screen 20, so that the sensing amount in the first area of ​​the touch screen 20 changes. The touch screen 20 can calculate the position 22 corresponding to the first electrode 12 based on the change in the sensing amount in the first area. Similarly, the second electrode 14 of the tip 10 also sends a second downlink signal 32 to the touch screen 20, so that the sensing amount in the second area of ​​the touch screen 20 changes. The touch screen 20 can calculate the position 24 corresponding to the second electrode 14 based on the change in the sensing amount in the second area. The touch screen 20 determines the tilt angle of the active stylus by calculating the distance L1 between the positions 22 and 24. The larger the distance L1, the larger the tilt angle of the active stylus. In one embodiment, the first downlink signal 30 and the second downlink signal 32 can be the same signal, and the sending time of the first downlink signal 30 and the second downlink signal 32 are staggered.

[0016] exist Figure 2 In addition to sending the second downlink signal 32, the second electrode 14 can also be used to receive an uplink signal (not shown) from the touch screen 20. The time when the second electrode 14 sends the second downlink signal 32 and receives the uplink signal must be staggered. For example, the second electrode 14 can send the second downlink signal 32 in a first period and receive the uplink signal in a second period.

[0017] Reference Figure 1 and Figure 2 In order to allow the touch screen 20 to more accurately determine the tilt angle, the present invention provides a preferred specification of the pen tip 10 as an illustration, but the present invention is not limited thereto. The distance a1 is 2.5mm to 6mm, the distance b1 is 4mm to 10mm, and the widths c1 and d1 can be determined according to the requirements of industrial design (ID design), for example, the width d1 is greater than c1 and less than c1+b1. In one embodiment, the distance a1 is 4mm, the distance b1 is 7mm, the width c1 is 2.6mm, and the width d1 is 6.7mm.

[0018] Figure 3 A second embodiment of the pen tip of the active stylus pen of the present invention is shown. Figure 3 The pen tip 40 has Figure 1 In addition to the first electrode 12 and the second electrode 14, there is also a third electrode 42. Figure 3 In the embodiment of the present invention, the second electrode 14 of the pen tip 40 is only used to send the second downlink signal 32. In the pen tip 40, the uplink signal sent by the touch screen 20 is received by the third electrode 42. The third electrode 42 is connected along Figure 3 The third electrode 42 is a ring-shaped electrode and surrounds a portion of the rod body 13, while the second electrode 14 surrounds and covers a portion of the third electrode 42. The first electrode 12, the second electrode 14 and the third electrode 42 do not contact each other. The third electrode 42 has a third opening 422 and a fourth opening 424, wherein the third opening 422 is outside the second electrode 14, and the fourth opening 424 is inside the second electrode 14, that is, the first opening 142 is between the third opening 422 and the fourth opening 424, and the fourth opening 424 is between the first opening 142 and the second opening 144. The rod body 13 passes through the first opening 142, the second opening 144, the third opening 422 and the fourth opening 424. There is a distance a2 between the end of the first electrode 12 away from the third opening 422 and the third opening 422. There is a distance b2 between the first opening 142 and the second opening 144. In one embodiment, the width d2 of the second opening 144 is greater than the width c2 of the first opening 142, and less than the sum of the width c2 of the first opening 142 and the second distance b2, c2+b2. A distance f1 is defined between the third opening 422 and the first opening 142. A distance e1=a2+f1 is defined between the end of the first electrode 12 away from the third opening 422 and the first opening 142. Figure 3 In the embodiment, the end of the first electrode 12 away from the third opening 422 refers to the lower edge of the first electrode 12 , so the distance a2 is the distance from the lower edge of the first electrode 12 to the third opening 422 .

[0019] In order to allow the touch screen 20 to more accurately determine the tilt angle, the present invention provides preferred specifications of the pen tip 40 as an illustration, but the present invention is not limited thereto. The distance a2 is 2.5mm to 5.5mm. The distance b2 is 4mm to 10mm. The distance e1 is 3mm to 6mm. The width c2, the width d2, the width g1 of the third opening 422, and the width h1 of the fourth opening 424 can be determined according to the requirements of industrial design, for example, the width d2 is greater than c2 and less than c2+b2. In one embodiment, the distance a2 is 3mm, the distance b2 is 7mm, the width c2 is 4.2mm, the width d2 is 6.7mm, the distance e1 is 4.5mm, the distance f1 is 1.5mm, and the width g1 is 2.6mm.

[0020] Figure 4 The third embodiment of the active stylus pen tip of the present invention is shown. Figure 3 The pen tip is 40, Figure 4 The pen tip 50 also includes the first electrode 12, the second electrode 14 and the third electrode 42, but the difference is that the third electrode 42 of the pen tip 50 is not surrounded by the second electrode 14, but is adjacent to the second electrode. The rod body 13 passes through the first opening 142 and the second opening 144 of the second electrode 14 and the third opening 422 and the fourth opening 424 of the third electrode 42. The fourth opening 424 of the third electrode 42 is between the first opening 142 and the third opening 422. The first electrode 12, the second electrode 14 and the third electrode 42 do not contact each other. The first electrode 12 and the second electrode 14 of the pen tip 50 are used to send the first downlink signal and the second downlink signal respectively, and the third electrode 42 is used to receive the uplink signal of the touch screen 20. There is a distance a3 between the end of the first electrode 12 away from the third opening 422 and the third opening 422. There is a distance b3 between the first opening 142 and the second opening 144. In one embodiment, the width d3 of the second opening 144 is greater than the width c3 of the first opening 142, and less than the sum of the width c3 of the first opening 142 and the second distance b3, c3+b3. The third opening 422 and the fourth opening 424 have a distance f2. The first opening 142 and the fourth opening 424 have a distance i1. The end of the first electrode 12 away from the third opening 422 and the first opening 142 have a distance e2=a3+f2+i1. Figure 4 In the embodiment, the end of the first electrode 12 away from the third opening 422 refers to the lower edge of the first electrode 12 , so the distance a3 is the distance from the lower edge of the first electrode 12 to the third opening 422 .

[0021] In order to allow the touch screen 20 to more accurately determine the tilt angle, the present invention provides preferred specifications of the pen tip 50 as an illustration, but the present invention is not limited thereto. The distance a3 is 2.5mm to 5mm. The distance b3 is 4mm to 10mm. The distance f2 is 0.5mm to 2.5mm. The distance i1 is 0.5mm to 1.5mm. The distance e2 is 3.5mm to 6mm. The width c3, the width d3, the width g2 of the third opening 422, and the width h2 of the fourth opening 424 can be determined according to the requirements of industrial design, for example, the width d3 is greater than c3 and less than c3+b3. In one embodiment, the distance a3 is 3mm, the distance b3 is 7mm, the width c3 is 4.2mm, the width d3 is 6.7mm, the distance e2 is 5.5mm, the distance f3 is 1.5mm, the width g2 is 2.6mm, the width h2 is 4mm, and the distance i1 is 1mm.

[0022] like Figure 2As shown, the first downlink signal 30 is provided to the first electrode 12 by the controller (not shown) in the body of the stylus via the rod 13. When the first electrode 12 sends the first downlink signal 30, the rod 13 also sends the downlink signal 30. When the pen tip 10 is tilted, if the downlink signal 30 sent by the rod 13 is too strong, the position 22 of the first electrode 12 calculated by the touch screen 20 may be offset. In order to reduce the offset of the position 22, the present invention can reduce the width of the rod 13 to reduce the strength of the downlink signal 30 sent by the rod 13, or increase the width of the first electrode 12 to increase the strength of the downlink signal 30 sent by the first electrode 12. In other words, the present invention can make the width of the first electrode 12 larger than the width of the rod 13, so that the position 22 calculated by the touch screen 20 is close to the position where the first electrode 12 actually contacts the touch screen 20.

[0023] Figure 5 The fourth embodiment of the active stylus pen tip of the present invention is shown, wherein the width of the first electrode 62 is greater than the width of the rod body 63. Figure 1 The pen tip is 10, Figure 5 The pen tip 60 also has the second electrode 14, but the difference is that the first electrode 62 of the pen tip 60 is spherical, and the diameter (or width) D1 of the first electrode 62 is greater than the diameter (or width) D2 of the rod body 63. Figure 5 In the embodiment of the present invention, the first electrode 62 is spherical, but the present invention is not limited thereto. The first electrode 62 may also be other regular or irregular shapes, as long as the width D1 of the first electrode 62 is greater than the width D2 of the rod body 63. Since the diameter D1 of the first electrode 62 is greater than the diameter D2 of the rod body 63, the strength of the downlink signal sent by the first electrode 62 is greater than the strength of the downlink signal sent by the rod body 63, so that the touch screen 20 can more accurately determine the position of the first electrode 62. In addition, since the first electrode 62 is spherical, the range of the first electrode 62 projected on the touch screen 20 is the same, so the position of the stylus calculated by the touch screen 20 is less affected by the tilt angle of the active stylus. In order to avoid scratching the surface of the touch screen, the first electrode 62 may be a conductive plastic, and the outside of the first electrode 62 may be covered with an insulator 64 to protect the first electrode 62 and prevent the first electrode 62 from being worn. In one embodiment, the first electrode 62 may also be a conductive metal. In order to prevent the first electrode 62 made of conductive metal from scratching the surface of the touch screen 20, the first electrode 62 may be covered with an insulator 64 to protect the touch screen. The rod 63 may be a conductive material of conductive plastic, metal, or a mixture of conductive plastic and metal. The rod 63 and the first electrode 62 may be made of the same material or different materials. When the rod 63 and the first electrode 62 are made of the same material, the rod 63 and the first electrode 62 may be integrally formed.

[0024] In order to allow the touch screen 20 to more accurately determine the position of the first electrode 62, the present invention provides a preferred specification of the pen tip 60 as an illustration, but the present invention is not limited thereto. The diameter D1 is greater than 0.8 mm, and the ratio of the diameter D1 to the diameter D2 (D1 / D2) is greater than 1.5, the thickness of the insulator 64 is 0.1 mm to 0.5 mm, and the center of the first electrode 62 is the center of the insulator 64. In one embodiment, the diameter D1 is 1.2 mm.

[0025] Figure 6 The fifth embodiment of the active stylus pen tip of the present invention is shown, wherein the width of the first electrode is greater than the width of the rod body. Figure 1 The pen tip is 10, Figure 6 The pen tip 70 also has the second electrode 14, but the difference is that the first electrode 72 of the pen tip 70 is arc-shaped, wherein the arc shape can be but is not limited to a semi-spherical shape. The diameter (or width) D3 of the first electrode 72 is greater than the diameter (or width) D4 of the rod body 73. Figure 6 In the embodiment of the present invention, the first electrode 72 has an arc-shaped surface, but the present invention is not limited thereto. The first electrode 72 may also be other regular or irregular shapes, as long as the width D3 of the first electrode 72 is greater than the width D4 of the rod body 73. The pen tip 70 also includes an insulator 74 between the first electrode 72 and the second electrode 14. The insulator 74 covers part of the rod body 73 and stops at one side of the first electrode 72, providing structural strength for the first electrode 72. In order to avoid scratching the surface of the touch screen, the first electrode 72 may be a conductive plastic. In one embodiment, the insulator 74 may also cover the first electrode 72 to prevent the first electrode 72 from being worn. In one embodiment, the first electrode 72 may also be a conductive metal. In order to avoid the conductive metal from scratching the surface of the touch screen, the insulator 74 may cover the first electrode 72 to protect the touch screen 20. The rod body 73 may be a conductive material of conductive plastic, metal, or a mixture of conductive plastic and metal. The rod body 73 and the first electrode 72 may be made of the same material or different materials. When the rod body 73 and the first electrode 72 are made of the same material, the rod body 73 and the first electrode 72 may be integrally formed.

[0026] In order to allow the touch screen 20 to more accurately determine the position of the first electrode 72, the present invention provides a preferred specification of the pen tip 70 as an illustration, but the present invention is not limited thereto. The diameter D3 is greater than 1 mm, and the ratio of the diameter D3 to the diameter D4 (D3 / D4) is greater than 2. In one embodiment, the diameter D3 is 1.6 mm.

[0027] exist Figures 1 to 6 In the embodiment of the present invention, the outer shell of the pen tip is omitted for the purpose of simplicity of the figure. The outer shell of the pen tip is a cone and is made of insulating material. Figure 1 , Figure 5 and Figure 6The second electrode 14 is arranged around the inner wall of the pen tip housing. Figure 3 and Figure 4 The second electrode 14 and the third electrode 42 are also arranged around the inner wall of the pen tip shell. The second electrode 14 and the third electrode 42 are separated and fixed inside the pen tip shell through the structure of the inner wall or other fixing means.

[0028] exist Figures 1 to 6 In the embodiment of the present invention, the pen body of the drawing stylus is omitted for the purpose of simplicity of the diagram. The pen body is connected to one end of the pen tip for the user to hold. The pen body has a space for accommodating the rod body, and a controller is arranged inside the pen body for providing a downlink signal to the first electrode and the second electrode. In one embodiment, the rod body is a conductor, and the controller is electrically connected to the rod body, and provides the downlink signal to the first electrode via the rod body.

[0029] The specifications of the above-mentioned embodiments are generated through repeated experiments and simulations, and can help the touch screen to accurately detect the position and tilt angle of the stylus.

[0030] The above description of the preferred embodiments of the present invention is for the purpose of explanation and is not intended to limit the present invention to the precise form disclosed. Modifications or changes based on the above teachings or learning from the embodiments of the present invention are possible. The embodiments are for explaining the principles of the present invention and allowing those skilled in the art to select and describe various embodiments to utilize the present invention in practical applications. The technical concept of the present invention is intended to be determined by the claims and their equivalents.

Claims

1. A pen tip of an active stylus pen, It is characterized in that include: a first electrode; as well as a second electrode disposed on one side of the first electrode, having a first opening and a second opening, the second electrode and the first electrode being arranged along a first direction, the first opening being smaller than the second opening and being between the first electrode and the second opening; There is a first distance between one end of the first electrode away from the first opening and the first opening, and there is a second distance between the first opening and the second opening. The first distance is 2.5 mm to 6 mm, and the second distance is 4 mm to 10 mm.

2. The pen tip of the active stylus pen as claimed in claim 1, It is characterized in that The width of the second opening is greater than the width of the first opening, and less than the sum of the width of the first opening and the second distance.

3. The pen tip of the active stylus pen as claimed in claim 1, It is characterized in that The first distance is 4 mm, the second distance is 7 mm, the width of the first opening is 2.6 mm, and the width of the second opening is 6.7 mm.

4. The pen tip of the active stylus pen as claimed in claim 1, It is characterized in that The second electrode sends a second downlink signal in a first period, and receives an uplink signal in a second period.

5. The pen tip of the active stylus pen as claimed in claim 1, It is characterized in that Also includes: a third electrode, disposed between the first electrode and the second electrode along the first direction, for receiving an uplink signal, the third electrode having a third opening and a fourth opening; The second electrode surrounds a portion of the third electrode, the third opening is outside the second electrode, and the fourth opening is inside the second electrode; There is a third distance between an end of the first electrode away from the third opening and the third opening, and there is a fourth distance between the third opening and the first opening.

6. The pen tip of the active stylus pen as claimed in claim 5, It is characterized in that The first distance is 3 mm to 6 mm, the third distance is 2.5 mm to 5.5 mm, and the fourth distance is 0.5 mm to 3 mm.

7. The pen tip of the active stylus pen as claimed in claim 5, It is characterized in that The first distance is 4.5 mm, the second distance is 7 mm, the third distance is 3 mm, the fourth distance is 1.5 mm, the width of the first opening is 4.2 mm, the width of the second opening is 6.7 mm, and the width of the third opening is 2.6 mm.

8. The pen tip of the active stylus pen as claimed in claim 1, It is characterized in that Also includes: a third electrode, disposed between the first electrode and the second electrode along the first direction, for receiving an uplink signal, the third electrode having a third opening and a fourth opening; Wherein, the third electrode is adjacent to the second electrode, and the fourth opening is between the first opening and the third opening; There is a third distance between one end of the first electrode away from the third opening and the third opening, there is a fourth distance between the third opening and the fourth opening, and there is a fifth distance between the fourth opening and the first opening.

9. The tip of the active stylus according to claim 8, wherein, the first distance is 3.5 mm to 6 mm, the third distance is 2.5 mm to 5 mm, the fourth distance is 0.5 mm to 2.5 mm, and the fifth distance is 0.5 mm to 1.5 mm.

10. The tip of the active stylus according to claim 8, wherein, the first distance is 5.5 mm, the second distance is 7 mm, the third distance is 3 mm, the fourth distance is 1.5 mm, the fifth distance is 1 mm, the width of the first opening is 4.2 mm, the width of the second opening is 6.7 mm, the width of the third opening is 2.6 mm, and the width of the fourth opening is 4 mm.

11. The tip of the active stylus according to claim 1, 5 or 8, wherein, it further includes a rod body made of a conductive material, the rod body extends along the first direction, is connected to the first electrode through the second electrode, and the rod body has a first diameter.

12. The tip of the active stylus according to claim 11, wherein, the first electrode is spherical in shape and has a second diameter, and the ratio of the second diameter to the first diameter is greater than 1.

5.

13. The tip of the active stylus according to claim 12, wherein, the second diameter is greater than 0.8 mm.

14. The tip of the active stylus according to claim 12, wherein, the second diameter is 1.2 mm.

15. The tip of the active stylus according to claim 12, wherein, it further includes an insulator covering the first electrode and having a thickness of 0.1 mm to 0.5 mm.

16. The tip of the active stylus according to claim 15, wherein, the center of the first electrode is the center of the insulator.

17. The tip of the active stylus according to claim 11, wherein, the first electrode is arc-shaped and has a second diameter, and the ratio of the second diameter to the first diameter is greater than 2.

18. The tip of the active stylus according to claim 17, wherein, the second diameter is greater than 1 mm.

19. The tip of the active stylus according to claim 17, wherein, the second diameter is 1.6 mm.

20. The tip of the active stylus according to claim 11, wherein, the first electrode is made of conductive plastic, and the rod body is made of conductive plastic, metal or a conductive material that is a mixture of conductive plastic and metal.

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