Electronic pen

Abstract

The application provides an electronic pen, which comprises a pen body, a first electrode and a second electrode. The first electrode and the second electrode are connected with the pen body and located at the same end of the pen body. The first electrode and the second electrode are arranged at intervals along the radial direction of the pen body. The first electrode can project a first projection area on the surface of a touch screen, and the second electrode can project a second projection area on the surface of the touch screen. The electronic pen can reduce the space occupation and the volume of the electronic pen.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, specifically to an electronic pen. Background Technology

[0002] Currently, electronic pens primarily interact with touchscreens via electrodes. They often employ a three-electrode structure, specifically, one electrode extending axially with two symmetrically arranged electrodes around it, or three electrodes spaced apart around an axial reference axis. While this structure can detect tilt and rotation for normal use, it occupies a significant amount of internal space, resulting in a large and inconveniently sized electronic pen. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes an electronic pen that can reduce the space occupied by the electronic pen and reduce its size.

[0004] An electronic pen according to an embodiment of this application includes a pen body, a first electrode, and a second electrode;

[0005] Pen body;

[0006] The first electrode and the second electrode are both connected to the pen body and located at the same end of the pen body. The first electrode and the second electrode are arranged at intervals along the radial direction of the pen body. The first electrode can project a first projection area on the surface of the touch screen, and the second electrode can project a second projection area on the surface of the touch screen.

[0007] The electronic pen according to the embodiments of this application has at least the following beneficial effects: when the electronic pen rotates, the first electrode and the second electrode rotate, causing the direction of the line connecting the first projection area and the second projection area to change; when the electronic pen tilts, the first electrode and the second electrode tilt, the sensing wall tilts, and the relative distance and / or size of the first projection area and the second projection area changes. Based on this, the first electrode and the second electrode can generate a capacitive coupling effect relative to the touch screen. When the position or size of the first projection area and the second projection area changes, it can cause a change in the capacitance of the touch screen, thereby causing a change in the electrical signal generated by the capacitive coupling, realizing the detection of the tilt and rotation angle of the electronic pen. This application simplifies the electrode structure of the electronic pen, and while ensuring the electronic pen's posture detection function, it can reduce the space occupied by the electronic pen and reduce its size.

[0008] According to some embodiments of this application, the first electrode and the second electrode are arranged to extend parallel to each other along the axial direction of the pen body.

[0009] According to some embodiments of this application, the first electrode and the second electrode are arranged symmetrically with respect to the axis of the pen body.

[0010] According to some embodiments of this application, the electronic pen includes a writing component, and a writing end is provided at the end of the writing component away from the pen body along the axial direction of the pen body. At least one of the first electrode and the second electrode has a tip at the end facing the writing end, and the cross-sectional area of ​​the tip gradually decreases along the direction close to the writing end.

[0011] According to some embodiments of this application, the electronic pen also includes a shielding coating, wherein the shielding coating is coated on the side of the first electrode facing the second electrode;

[0012] And / or, the side of the second electrode facing the first electrode is coated with a shielding coating.

[0013] According to some embodiments of this application, the electronic pen also includes a shielding member, at least a portion of which is located between the first electrode and the second electrode.

[0014] According to some embodiments of this application, the electronic pen further includes an erasing component, which includes a first pressure-sensitive element and a third electrode. The pen body has a receiving cavity in which the first pressure-sensitive element is located along the axial direction of the pen body. The third electrode is located at one end away from the first electrode and the second electrode and is movable relative to the pen body.

[0015] The erasing component has an erasing mode. In the erasing mode, the third electrode abuts against the first pressure-sensitive element, and the third electrode can be brought close to the touch screen for coupling to erase the writing.

[0016] According to some embodiments of this application, the erasing component further includes a conductive element configured to be electrically connected to the main control board;

[0017] The erasing component also has a sleep mode. In the sleep mode, the first pressure-sensitive element is in contact with the conductive element and is separated from the third electrode. In the erasing mode, the first pressure-sensitive element is separated from the conductive element.

[0018] According to some embodiments of this application, the electronic pen further includes an auxiliary electrode and / or an inertial sensor. The pen body has a receiving cavity, and at least a portion of the auxiliary electrode and / or inertial sensor is located in the receiving cavity. The auxiliary electrode and / or inertial sensor are used to cooperate with the first electrode and the second electrode to detect the posture of the electronic pen.

[0019] According to some embodiments of this application, the electronic pen also includes a writing component. Along the radial direction of the pen body, one of the pen body and the writing component is provided with a limiting groove, and the other is provided with a limiting protrusion. Along the axial direction of the pen body, the writing component is movable relative to the pen body.

[0020] The limiting groove and the limiting protrusion are multiple in number and are distributed at intervals along the axial direction of the pen body. The limiting protrusion is configured to be driven to move radially along the pen body.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a simplified structural diagram of an electronic pen projected onto a touchscreen according to an embodiment of this application;

[0024] Figure 2 This is a simplified diagram of the tilt projection variation of the electronic pen according to an embodiment of this application;

[0025] Figure 3 This is a partial cross-sectional view of the electronic pen according to an embodiment of this application;

[0026] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0027] Figure 5 This is a simplified structural diagram of the electronic pen and touch screen according to another embodiment of this application.

[0028] Figure 6 This is a partial structural view of the tail of the electronic pen according to an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the structure of the electronic pen according to an embodiment of this application.

[0030] Reference numerals: pen body 100, receiving cavity 110, second pressure-sensitive element 120, auxiliary electrode 130, inertial sensor 140;

[0031] Writing component 200, first electrode 210, second electrode 220, writing end 230, shielding coating 240, shielding component 250, writing body 260, through hole 261, protective sleeve 270, first connecting part 281, second connecting part 282, first elastic element 290;

[0032] Erasing assembly 300, first pressure-sensitive element 310, abutment portion 311, conductive portion 312, third electrode 320, first bracket 330, conductive element 331, second through hole 332, first protrusion 333, second bracket 340, second protrusion 341, second elastic element 350, buffer element 360, insulating substrate 370. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0034] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0036] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0037] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The embodiments of this application are described below with reference to the accompanying drawings:

[0039] refer to Figures 1 to 3According to an embodiment of this application, the electronic pen includes a pen body 100, a first electrode 210 and a second electrode 220. The first electrode 210 and the second electrode 220 are both connected to the pen body 100 and located at the same end of the pen body 100. Along the radial direction of the pen body 100, the first electrode 210 and the second electrode 220 are arranged at intervals. The first electrode 210 can project a first projection area on the surface of the touch screen, and the second electrode 220 can project a second projection area on the surface of the touch screen.

[0040] Specifically, the electronic pen includes a writing component 200, and the pen body 100 is provided with a receiving cavity 110. The writing component 200 is connected to the pen body 100, and a part of the writing component 200 is located in the receiving cavity 110. The writing component 200 includes a first electrode 210 and a second electrode 220. Along the radial direction of the pen body 100, the first electrode 210 and the second electrode 220 are arranged at intervals. Along the axial direction of the pen body 100, the end of the writing component 200 away from the pen body 100 is provided with a writing end 230. The end of the first electrode 210 facing the writing end 230 can project a first projection area on the surface of the touch screen, and the end of the second electrode 220 facing the writing end 230 can project a second projection area on the surface of the touch screen.

[0041] Along the axial direction of the pen body 100, the writing component 200 has a writing end 230 at the end furthest from the pen body 100, which is used to contact the touch screen. The first electrode 210 and the second electrode 220 are close to the touch screen and can generate a capacitive coupling effect with it. When the electronic pen rotates and / or tilts, the first electrode 210 and the second electrode 220 rotate and / or tilt accordingly, causing the first and second projection areas projected onto the touch screen surface to change. For example, when the electronic pen rotates, the extension direction of the line connecting the first and second projection areas changes; when the electronic pen tilts at an angle, the distance between the first and second projection areas changes; and / or, the position and area of ​​the first and second projection areas change. As a result, the capacitive coupling signal between the electronic pen and the touch screen changes. Based on this change in the capacitive coupling signal, the rotation and tilt posture of the electronic pen can be detected. The electronic pen of this application simplifies the electrode structure, which helps to reduce the space occupied inside the electronic pen, making the electronic pen smaller and more convenient to use.

[0042] It should be noted that as the axis of the pen body 100 becomes more perpendicular to the touch screen, the distance between the first projection area and the second projection area increases. As the angle between the axis of the pen body 100 and the touch screen decreases, the distance between the first projection area and the second projection area decreases, and / or the position and area of ​​the first projection area and the second projection area change.

[0043] Along the radial direction of the pen body 100, the first electrode 210 and the second electrode 220 are arranged at intervals, which should be understood as the first electrode 210 and the second electrode 220 being non-collinearly arranged. For example, the axis of the pen body 100 passes through the line connecting the first electrode 210 and the second electrode 220, or the axis of the pen body 100 passes through one of the first electrode 210 and the second electrode 220. Therefore, the axis of the pen body 100 passes through the line connecting the first electrode 210 and the second electrode 220.

[0044] also, Figure 1 The arrows in the diagram indicate the direction of rotation of the electronic pen along the axis of the pen body 100. The solid line area represents the projection area of ​​the two electrodes facing the writing end 230 on the touch screen surface when the electronic pen is in its current position. The dashed line area represents the projection of the two electrodes facing the writing end 230 on the touch screen surface after the electronic pen is rotated.

[0045] Figure 2 The dashed line represents the position of the electronic pen before the posture changes, and the solid line represents the position of the electronic pen after the posture changes. Correspondingly, the dashed line area represents the projection area of ​​the two electrodes facing the writing end 230 before the posture changes, and the solid line area represents the projection area of ​​the two electrodes facing the writing end 230 after the posture changes.

[0046] refer to Figures 1 to 3 Specifically, the first electrode 210 and the second electrode 220 can be shaped like cylinders, cuboids, prisms, pyramids, or other geometric shapes. Taking the first electrode 210 and the second electrode 220 as cylinders as an example, along the axial direction of the pen body 100, the end of the first electrode 210 near the writing end 230 can project a circular first projection area onto the touchscreen surface, and the second electrode 220 can project a circular second projection area onto the touchscreen surface. As the electronic pen rotates and tilts, the distance and / or size between the first projection area and the second projection area change, thereby covering the first projection area and the second projection area. On the surface of the touchscreen, the capacitance changes at different locations are different. As the first electrode 210 and the second electrode 220 approach the touchscreen, a capacitive coupling effect is generated between the first electrode 210 and the electrodes of the touchscreen, and a capacitive coupling effect is generated between the second electrode 220 and the electrodes of the touchscreen. This capacitive coupling causes the capacitance value of the electrodes on the touchscreen to change. Thus, the touchscreen controller determines the position and shape of the projection area by scanning and comparing the capacitance value changes of each electrode. Furthermore, based on the relative position and size changes between the first projection area and the second projection area, the posture detection of the electronic pen can be realized.

[0047] It should be noted that, along the axial direction of the pen body 100, the ends of the first electrode 210 and the second electrode 220 facing the writing end 230 are used for capacitive coupling with the touch screen.

[0048] refer to Figures 1 to 3 In other embodiments, along the axial direction of the pen body 100, the writing component 200 is connected to the pen body 100, sealing one end of the receiving cavity 110. The first electrode 210 and the second electrode 220 are located inside the receiving cavity 110. The writing end 230 of the writing component 200 exposed outside the receiving cavity 110 is used to contact the touch screen for writing. During the writing process, the writing end 230 vibrates due to contact and friction with the touch screen. By placing the first electrode 210 and the second electrode 220 inside the receiving cavity 110, the vibration transmitted from the writing end 230 to the first electrode 210 and the second electrode 220 can be effectively reduced. As a result, the position of the first electrode 210 and the second electrode 220 inside the receiving cavity 110 is more stable. Furthermore, the capacitive coupling between the first electrode 210 and the second electrode 220 and the electrodes of the touch screen is more precise, which is beneficial to improving the accuracy of the electronic pen in detecting writing posture.

[0049] refer to Figures 1 to 3 In another embodiment, at least a portion of the first electrode 210 and the second electrode 220 are located outside the receiving cavity 110, that is, at least a portion of the first electrode 210 is located outside the receiving cavity 110, and / or at least a portion of the second electrode 220 is located outside the receiving cavity 110. When writing, the first electrode 210 and / or the second electrode 220 can be closer to the touch screen, thereby facilitating more stable capacitive coupling between the first electrode 210 and / or the second electrode 220 and the touch screen, which is beneficial for the electronic pen to more accurately detect changes in writing posture.

[0050] refer to Figures 1 to 3 In other embodiments, the lengths of the first electrode 210 and the second electrode 220 along the axial direction of the pen body 100 may be inconsistent. For example, the length of the first electrode 210 may be greater than that of the second electrode 220 along the axial direction of the pen body 100. Thus, during writing, the first electrode 210 can be closer to the touch screen, forming a first projection area with strong capacitive sensing on the touch screen. The second electrode 220 is farther away from the touch screen than the first electrode 210, forming a second projection area with weak capacitive sensing on the touch screen. Based on the difference in the strength of the capacitive coupling effect generated by the electronic pen in the first projection area and the second projection area, the difference in the strength of the capacitive coupling effect generated at the location of the first projection area and the second projection area can also be used to detect special angles such as 90° and 180° rotation, making it easier to detect changes in the rotation posture of the electronic pen.

[0051] It should be noted that before rotation, the first projection area is located above the second projection area. After the pen rotates 90°, if the second projection area is to the left of the first projection area, the pen is judged to have rotated 90° clockwise; if the second projection area is to the right of the first projection area, the pen is judged to have rotated 90° counterclockwise. It should be understood that when the axis of the pen body 100 is perpendicular to the touchscreen, the first and second projection areas can be distinguished based on the strength of the capacitive coupling effect in different areas. When the axis of the pen body 100 is tilted relative to the touchscreen, the strength of the capacitive coupling effect varies at different points within the first or second projection area, thus allowing for the determination of rotation of either the first or second projection area, achieving pen rotation detection.

[0052] refer to Figures 1 to 3 In other embodiments, the shapes of the first electrode 210 and the second electrode 220 may be different. For example, the first electrode 210 may be a cylinder and the second electrode 220 may be a prism. The two electrodes can project projection areas of different shapes onto the touch screen surface. Thus, based on the two projection areas of different shapes, it is easier to detect the rotation of the electronic pen.

[0053] refer to Figures 1 to 3 In other embodiments, the first electrode 210 and the second electrode 220 have the same shape, but their thicknesses may be different, so that they can project projection areas of different sizes onto the touch screen surface. Based on the different sizes of the projection areas, it is convenient to detect the rotation of the electronic pen.

[0054] refer to Figures 1 to 3 In some embodiments, the first electrode 210 and the second electrode 220 extend parallel to each other along the axial direction of the pen body 100. The parallel arrangement of the two electrodes makes the capacitive coupling more uniform in the first projection area and the second projection area on the touch screen surface, which simplifies the processing of capacitive coupling signals and makes the electronic pen writing feedback more timely and stable.

[0055] Specifically, the first electrode 210 and the second electrode 220, which are arranged parallel to each other along the axis of the pen body 100, can form a relatively uniform electric field between them. During the interaction between the electronic pen and the touch screen, the first electrode 210 and the second electrode 220 can be capacitively coupled more stably relative to the touch screen, making the detected capacitance changes more regular and predictable, reducing the complexity and error of signal processing, thereby improving the accuracy of detecting information such as the position and posture of the electronic pen.

[0056] refer to Figures 1 to 3In some embodiments, the first electrode 210 and the second electrode 220 are arranged symmetrically with respect to the axis of the pen body 100. That is, along the radial direction of the pen body 100, the first electrode 210 and the second electrode 220 are equidistant from the axis of the pen body 100. Based on the symmetrical arrangement of the first electrode 210 and the second electrode 220, when the electronic pen is tilted, the first electrode 210 and the second electrode 220 tilt accordingly. As a result, the first projection area and the second projection area move in the tilt direction, and the offset of the first projection area and the second projection area is consistent. Based on the offset of any projection area, the tilt angle of the electronic pen can be detected by feedback, which simplifies the algorithm for detecting the tilt angle of the electronic pen.

[0057] refer to Figures 1 to 3 In some embodiments, the electronic pen includes a writing component 200. Along the axial direction of the pen body 100, the writing component 200 has a writing end 230 at one end away from the pen body 100. At least one of the first electrode 210 and the second electrode 220 has a tip at one end facing the writing end 230. The tip is used for capacitive coupling with the electrodes of the touch screen. The cross-sectional area of ​​the tip gradually decreases along the direction close to the writing end 230, so that the charge of the first electrode 210 and / or the second electrode 220 is more concentrated at the end close to the writing end 230, forming a more concentrated electric field. This is beneficial to enhance the capacitive coupling effect between the electronic pen and the touch screen, and thus can more accurately reflect the contact position of the writing end 230, achieving more accurate writing.

[0058] For example, along the axial direction of the pen body 100, the cross-sectional area of ​​the first electrode 210 near the writing end 230 (i.e. the tip) is smaller than that of other positions. As a result, the first electrode 210 can form a more stable capacitive sensing area with the touch screen. When the electronic pen is rotated or tilted, the change in the posture of the electronic pen can be detected more accurately, thereby further improving writing accuracy and touch sensitivity.

[0059] It should be noted that, similarly to the first electrode 210, the second electrode 220 has a smaller cross-sectional area at the end closer to the writing end 230 compared to other positions, which can further improve writing accuracy. The first electrode 210 and the second electrode 220 can be individually configured with a decreasing cross-sectional area at their ends towards the writing end, or both can be configured with a decreasing cross-sectional area at their ends. Through their combination, the capacitive coupling effect is more stable, and the boundary of the capacitive coupling is clearer, facilitating more accurate posture detection of the electronic pen.

[0060] refer to Figures 3 to 5In some embodiments, the electronic pen further includes a shielding coating 240, wherein the shielding coating 240 is coated on the side of the first electrode 210 facing the second electrode 220, and / or the shielding coating 240 is coated on the side of the second electrode 220 facing the first electrode 210. The shielding coating 240 is used to block electric field interference between the first electrode 210 and the second electrode 220, preventing the first electrode 210 from interfering with the capacitive coupling between the second electrode 220 and the touch screen, or preventing the capacitive coupling between the second electrode 220 and the touch screen. Within the first projection area and the second projection area, the touch screen can more accurately identify the capacitive coupling information, thereby improving the accuracy of the electronic pen's posture detection.

[0061] It should be noted that the shielding coating 240 can be made of insulating materials with high dielectric constant and low conductivity, such as ceramic materials, polymer insulating materials and metal oxides. By coating the shielding coating 240, the electric field distribution inside the electronic pen can be changed, thereby blocking the mutual interference between the first electrode 210 and the second electrode 220.

[0062] refer to Figures 3 to 5 In other embodiments, along the axial direction of the pen body 100, the side of the first electrode 210 facing the writing end 230 is used for capacitive coupling with the touch screen, and the side of the second electrode 220 facing the writing end 230 is used for capacitive coupling with the touch screen. The shielding coating 240 covers the area other than the side of the first electrode 210 facing the writing end 230, and / or the shielding coating 240 covers the area other than the side of the second electrode 220 facing the writing end 230. This forms a tighter wrapping around the first electrode 210 and / or the second electrode 220, which is beneficial for better blocking electric field interference between the first electrode 210 and the second electrode 220, thereby further improving the detection accuracy of the electronic pen.

[0063] refer to Figures 3 to 5 In other embodiments, the electronic pen also includes a shield 250. At least a portion of the shield 250 is located between the first electrode 210 and the second electrode 220 along the radial direction of the pen body 100, in order to further block the mutual interference between the first electrode 210 and the second electrode 220 and improve the accuracy of the electronic pen's posture detection.

[0064] refer to Figures 3 to 5In other embodiments, along the axial direction of the pen body 100, the shield 250 includes a first through groove and a second through groove, and along the radial direction of the pen body 100, the first through groove and the second through groove are arranged at intervals. The first electrode 210 is inserted into the first through slot along the axial direction of the pen body 100, and the second electrode 220 is inserted into the second through slot along the axial direction of the pen body 100. The shield 250 can be made of a low conductivity material. On the one hand, the wall of the first through slot surrounds the outer peripheral wall of the first electrode 210, and the wall of the second through slot surrounds the outer peripheral wall of the second electrode 220, so that the shield 250 can further block the electric field interference between the first electrode 210 and the second electrode 220. On the other hand, the wall of the first through slot can fix and support the first electrode 210, and the wall of the second through slot can fix and support the second electrode 220, so as to ensure the stability of the first electrode 210 and the second electrode 220, effectively avoiding the displacement or deformation of the first electrode 210 and the second electrode 220 due to excessive pressing of the writing end 230, which is beneficial to ensuring the accuracy of the electronic pen posture detection.

[0065] refer to Figures 4 to 6 In other embodiments, the writing component 200 includes a writing body 260 and a protective sleeve 270. The writing body 260 is connected to the pen body 100, and at least a portion of the writing body 260 is exposed in the receiving cavity 110. Along the axial direction of the pen body 100, the protective sleeve 270 covers the end of the writing body 260 away from the pen body 100 to form a writing end 230. The protective sleeve 270 can be made of rubber, TPU (Thermoplastic Urethane), or other relatively soft materials. The protective sleeve 270 is used to contact the touch screen. On the one hand, the protective sleeve 270 can produce elastic deformation, and has a large contact area with the touch screen, so that the electronic pen has a better damping feel when writing, and it is easier to control the writing force and direction. On the other hand, the protective sleeve 270 can prevent the writing body 260 from contacting the touch screen, which is beneficial to ensuring the integrity of the touch screen.

[0066] refer to Figures 4 to 6 In other embodiments, the writing body 260 is provided with a through hole 261, which connects to the receiving cavity 110. Along the axial direction of the pen body 100, the first electrode 210 and the second electrode 220 pass through the through hole 261 and extend out of the through hole 261 at the end away from the pen body 100. In the through hole 261, the first electrode 210 and the second electrode 220 are arranged at intervals. The protective sleeve 270 covers the portions of the first electrode 210 and the second electrode 220 that extend out of the through hole 261, and also covers a portion of the writing body 260 to form a writing end 230. Thus, when the protective sleeve 270 contacts the touch screen, the first electrode 210 and the second electrode 220 are closer to the touch screen, thereby making the capacitive coupling between the two electrodes and the touch screen more stable.

[0067] Specifically, a portion of the writing body 260 is located within the receiving cavity 110, a portion of the through hole 261 is located within the receiving cavity 110, and the first electrode 210 and the second electrode 220 each include the following three parts: one is located within the receiving cavity 110, the second is located within the through hole 261, and the third extends out of the through hole 261. The protective sleeve 270 covers a portion of the writing body 260, and also covers the portions of the first electrode 210 and the second electrode 220 that extend out of the through hole 261.

[0068] refer to Figures 4 to 6 In other embodiments, the protective sleeve 270 is detachably connected to the writing body 260, the first electrode 210, and the second electrode 220 to facilitate the replacement of protective sleeves 270 of different sizes or materials, so as to adjust the thickness, elasticity, and other physical characteristics of the writing end 230 of the electronic pen.

[0069] refer to Figure 5 In other embodiments, the protective sleeve 270 is provided with a protective cavity whose shape is adapted to the shape and size of the first electrode 210 and the second electrode 220. As a result, the protective sleeve 270 can better fit the first electrode 210 and the second electrode 220, making the connection between the protective sleeve 270 and the two electrodes more stable, so as to limit the protective sleeve 270 from deflecting relative to the two electrodes.

[0070] refer to Figure 5 In other embodiments, the protective sleeve 270 is a flexible component. To ensure the stability of the connection of the protective sleeve 270, the size of the protective cavity is smaller than the size of the first electrode 210 and the second electrode 220. The protective sleeve 270 can undergo elastic deformation to increase the cross-section of the protective cavity to accommodate the first electrode 210 and the second electrode 220. When at least a portion of the first electrode 210 and the second electrode 220 is placed in the protective cavity, the protective sleeve 270 can undergo elastic rebound to make the cavity wall of the protective cavity fit against the outer surface of the first electrode 210 and / or the second electrode 220. Thus, the protective sleeve 270 can fit the first electrode 210 and the second electrode 220 more tightly.

[0071] refer to Figures 5 to 7 In some embodiments, the electronic pen further includes an erasing component 300, which includes a first pressure-sensitive element 310 and a third electrode 320. The pen body 100 has a receiving cavity 110, in which the first pressure-sensitive element 310 is located along the axial direction of the pen body 100. The third electrode 320 is located at the end of the pen body 100 away from the writing component 200 and is movable relative to the pen body 100. The erasing component 300 has an erasing mode in which the third electrode 320 abuts against the first pressure-sensitive element 310, and the third electrode 320 can be brought close to the touch screen for coupling to erase the writing.

[0072] Specifically, the erasing component 300 also includes a sleep mode. In sleep mode, the third electrode 320 is separated from the first pressure-sensitive element 310, and the third electrode 320 cannot erase written marks in sleep mode. When the third electrode 320 approaches the touch screen, the third electrode 320 can be driven to move relative to the pen body 100 along the axis of the pen body 100 until it contacts the first pressure-sensitive element 310, at which point the erasing component 300 switches to the erasing mode.

[0073] It should be noted that the erasure signal and the writing signal can be distinguished based on signals of different frequencies. In addition, the third electrode 320 can move relative to the pen body 100 by being directly and movably connected to the pen body 100, or indirectly connected to the pen body 100 through other structures, as long as the third electrode 320 can move relative to the pen body 100 along the axis of the pen body 100.

[0074] refer to Figure 3 and Figure 4 In some embodiments, the electronic pen includes a second pressure-sensitive element 120. Along the axial direction of the pen body 100, both the first electrode 210 and the second electrode 220 are movably connected to the pen body 100, with the first electrode 210 abutting against the second pressure-sensitive element 120, and the second electrode 220 abutting against the second pressure-sensitive element 120. To transmit pressure to the second pressure-sensitive element 120, a portion of the first electrode 210 may be located outside the receiving cavity 110, and a portion of the second electrode 220 may be located outside the receiving cavity 110. Alternatively, an extension member connected to the writing end 230 may be provided, extending out of the receiving cavity 110. 0. The side of the extension member away from the writing end 230 is connected to the first electrode 210, and the extension member extends out of the receiving cavity 110. Thus, when the writing end 230 contacts the touch screen, it can transmit pressure to the first electrode 210 and the second electrode 220. In turn, the first electrode 210 and the second electrode 220 can transmit the pressure between the writing end 230 and the touch screen to the second pressure-sensitive element 120. Thus, by detecting the contact pressure between the writing end 230 and the touch screen, the second pressure-sensitive element 120 can enable the main control board to actively feed back signals to the touch screen, thereby realizing the active adjustment of the thickness of the writing strokes.

[0075] When the electronic pen approaches or touches the touch screen, a capacitive coupling effect occurs between the two to determine the contact position of the electronic pen. During writing, the second pressure-sensitive element 120 can detect the amount of pressure applied to the electronic pen, so that the main control board can more accurately control parameters such as the thickness and depth of the writing based on the amount of pressure, which is beneficial to further optimize the writing effect of the electronic pen.

[0076] refer to Figure 3 and Figure 4In other embodiments, the writing component 200 includes a first connecting portion 281, a second connecting portion 282, and a first elastic member 290. The first connecting portion 281 and the second connecting portion 282 are detachably connected, either by a threaded connection or a snap-fit ​​connection. The first connecting portion 281 is located within the receiving cavity 110, and the second connecting portion 282 extends out of the receiving cavity 110 along the axial direction of the pen body 100. Along the axial direction of the pen body 100, the first electrode 210 and the second electrode 220 are both connected to the side of the second connecting portion 282 opposite to the first connecting portion 281. The second connecting portion 282 is made of an insulating material to block the electrical conduction between the first electrode 210 and the second electrode 220. The pen body 100 also includes a support structure located within the receiving cavity 110. Along the radial direction of the pen body 100, the first connecting portion 281 has a first outward protrusion, and the support structure has a second outward protrusion. Along the axial direction of the pen body 100, the first elastic element 290 is located on the side of the first protrusion away from the second pressure-sensitive element 120. One end of the first elastic element 290 abuts against the first protrusion, and the other end of the first elastic element 290 abuts against the second protrusion. Thus, the elastic force of the first elastic element 290 on the first connecting part is directed towards the side where the second pressure-sensitive element 120 is located. The first connecting part 281 and the second pressure-sensitive element 120 maintain elastic abutment, thereby realizing the transmission of writing pressure.

[0077] refer to Figures 5 to 7 In some embodiments, the erasing assembly 300 further includes a conductive element 331 configured to be electrically connected to the main control board. The erasing assembly 300 also has a sleep mode. In sleep mode, the first pressure-sensitive element 310 abuts against the conductive element 331, and the first pressure-sensitive element 310 is separated from the third electrode 320. In erasing mode, the first pressure-sensitive element 310 is separated from the conductive element 331. Therefore, when the first pressure-sensitive element 310 abuts against the third electrode 320 and is separated from the conductive element 331, the third electrode 320 is controlled by the erasing signal, effectively preventing the main control board from continuously transmitting the erasing signal to the third electrode 320, making the electronic pen more energy-efficient.

[0078] Specifically, when the first pressure-sensitive element 310 is separated from the conductive element 331, the main control board can detect the change in potential at the conductive element 331. The main control board changes from transmitting writing signals to transmitting erasing signals. At this time, the third electrode 320 abuts against the first pressure-sensitive element 310. The third electrode 320 can be directly electrically connected to the main control board to receive erasing signals, or it can receive erasing signals through the first pressure-sensitive element 310. During erasing, the degree of erasure is controlled by the first pressure-sensitive element 310. The greater the interaction force between the third electrode 320 and the first pressure-sensitive element 310, the more thorough the erasure.

[0079] refer to Figures 5 to 7In other embodiments, the erasing assembly 300 includes a buffer 360 and an insulating substrate 370. Along the axial direction of the pen body 100, the buffer 360 is located between the insulating substrate 370 and the first pressure-sensitive element 310. The buffer 360 can be a spring, rubber, or other structure capable of elastic deformation. When the third electrode 320 causes the first pressure-sensitive element 310 to separate from the conductive element 331, the buffer 360 is compressed. When the third electrode 320 separates from the first pressure-sensitive element 310, the buffer 360 rebounds, causing the first pressure-sensitive element 310 to abut against the conductive element 331. The insulating substrate 370 is connected to the conductive element 331. When the first pressure-sensitive element 310 separates from the conductive element 331, the insulating substrate 370 prevents the first pressure-sensitive element 310 from conducting with the conductive element 331, thereby enabling switching between the erasing mode and the sleep mode.

[0080] Additionally, refer to Figure 6 The first pressure-sensitive element 310 includes an abutment portion 311 and a conductive portion 312. The abutment portion 311 and the conductive portion 312 are electrically connected. Along the axial direction of the pen body 100, the abutment portion 311 is located on the side of the conductive portion 312 away from the buffer member 360. In the erase mode, the abutment portion 311 abuts against the third electrode 320, and the conductive portion 312 is separated from the conductive member 331. In the sleep mode, the abutment portion 311 is separated from the third electrode 320, and the conductive portion 312 abuts against the conductive member 331.

[0081] refer to Figures 5 to 7 In some embodiments, the electronic pen further includes a first support 330 and a second elastic member 350. Along the axial direction of the pen body 100, the first support 330 is provided with a second through hole 332, and a third electrode 320 passes through the second through hole 332. One end of the second elastic member 350 abuts against the first support 330, and the other end of the second elastic member 350 abuts against the third electrode 320. The third electrode 320 can approach the touch screen and directly or indirectly contact the touch screen, so that the third electrode 320 moves relative to the pen body 100. When the third electrode 320 moves toward the first pressure-sensitive element 310, the second elastic member 350 is compressed. After the erasing operation, the second elastic member 350 rebounds to drive the third electrode 320 to separate from the first pressure-sensitive element 310. The second through hole 332 provides guidance for the movement of the third electrode 320, making the movement of the third electrode 320 smoother.

[0082] Specifically, the second elastic element 350 can be a spring with a hollow structure, and the third electrode 320 passes through the spring. Both are placed in the second through hole 332, making the structure of the erasing assembly 300 more compact. To ensure that the third electrode 320 and the second elastic element 350 can be accommodated simultaneously, the second through hole 332 is configured as a stepped hole with two sections of different diameters. The section with the smaller diameter is used to accommodate the third electrode 320, and the section with the larger diameter is used to accommodate the third electrode 320 and the second elastic element 350.

[0083] refer to Figures 5 to 7 In other embodiments, the electronic pen further includes a second support 340 connected to the third electrode 320, allowing the second support 340 to move together with the third electrode 320. Along the radial direction of the pen body 100, the first support 330 has a first protrusion 333, and the second support 340 has a second protrusion 341. In sleep mode, the first protrusion 333 and the second protrusion 341 abut against each other along the axial direction of the pen body 100, thereby limiting the separation of the first support 330 and the second support 340 and ensuring the state switching of the erasing component 300.

[0084] refer to Figures 1 to 6 In some embodiments, the writing assembly 200 further includes an auxiliary electrode 130 and / or an inertial sensor 140. At least a portion of the auxiliary electrode 130 and / or the inertial sensor 140 is located within the receiving cavity 110. The auxiliary electrode 130 and / or the inertial sensor 140 are used in conjunction with the first electrode 210 to detect the posture of the electronic pen. For example, during writing, both the first electrode 210 and the auxiliary electrode 130 can be capacitively coupled to the touch screen. The auxiliary electrode 130 can provide auxiliary judgment for the posture detection of the electronic pen. Alternatively, the inertial sensor 140 is configured to be electrically connected to the main control board. The inertial sensor 140 is used to assist in detecting the posture parameters of the electronic pen relative to the X-axis, Y-axis, and Z-axis (measuring physical parameters such as acceleration, angular velocity, and heading angle of the electronic pen) and can be fed back to the main control board in the form of electrical signals. In conjunction with the capacitive coupling between the first electrode 210 and the touch screen, it is beneficial to further improve the accuracy of the electronic pen posture detection.

[0085] Specifically, the auxiliary electrode 130 can project an auxiliary projection area onto the touchscreen. The position of the auxiliary projection area changes with the landing point of the writing end 230 of the electronic pen on the touchscreen. The shape and size of the auxiliary projection area correspond to the tilt angle of the electronic pen relative to the touchscreen. The auxiliary electrode 130 can work with the first electrode 210 to capacitively couple with the touchscreen, allowing for more accurate detection of the electronic pen's posture. Alternatively, a primary capacitive coupling signal can be generated between the first electrode 210 and the touchscreen. The auxiliary electrode 130 can be arranged adjacent to the first electrode 210, generating a secondary capacitive coupling signal between the auxiliary electrode 130 and the touchscreen. Based on different postures of the electronic pen, the intensity ratio of the primary capacitive coupling signal to the secondary capacitive coupling signal will change. Thus, the touchscreen can determine different postures of the electronic pen based on the positions of the first electrode 210 and the auxiliary electrode 130, as well as the intensity ratio of the primary and secondary capacitive coupling signals, which is beneficial for more accurate posture detection of the electronic pen.

[0086] The inertial sensor 140 may include an accelerometer, a gyroscope, and a magnetometer, all electrically connected to the main control board. The accelerometer measures the translation and tilt angle of the electronic pen along the X, Y, and Z axes (e.g., based on the components of the electronic pen's gravity along the three axes). The gyroscope measures the angular velocity of the electronic pen's rotation around the X, Y, and Z axes and converts it into a digital signal output. Based on the angular velocity of rotation, the angle of the electronic pen can be calculated by integration, thereby achieving attitude control of the electronic pen in space. The magnetometer detects the components of the Earth's magnetic field along the X, Y, and Z axes, calculates the geographic direction pointed to by the writing end 230, and provides a heading angle calibration reference for the gyroscope. Thus, determining the current attitude of the electronic pen based on multiple physical parameters helps to further improve the accuracy of the electronic pen's attitude detection.

[0087] refer to Figures 1 to 7In some embodiments, the electronic pen includes a writing component 200. Along the radial direction of the pen body 100, one of the pen body 100 and the writing component 200 is provided with a limiting groove and the other is provided with a limiting protrusion. Along the axial direction of the pen body 100, the writing component 200 is movable relative to the pen body 100. The pen body 100 has multiple limiting grooves and limiting protrusions, which are spaced apart along the axial direction of the pen body 100. The limiting protrusions are configured to be driven to move radially along the pen body 100. As the writing component 200 moves relative to the pen body 100 along the axial direction of the pen body 100, the same limiting protrusion can be engaged in different limiting grooves, or different limiting protrusions can be engaged in the same limiting groove, so as to adjust the length of the writing component 200 exposed in the receiving cavity 110. This not only ensures that the total length of the electronic pen is adjustable, which is convenient to adapt to different hand shapes and grip habits, but also allows the writing component 200 to be separated from the pen body 100 after moving to a certain position, realizing the detachability between the writing component 200 and the pen body 100, which is convenient for the maintenance of the electronic pen.

[0088] For example, the pen body 100 is provided with a limiting groove, and the writing component 200 is provided with multiple limiting protrusions. Each limiting protrusion is arranged at intervals along the axial direction of the pen body 100. When the writing component 200 is connected to the pen body 100, one of its limiting protrusions is engaged in the limiting groove. As the writing component 200 moves relative to the pen body 100, the limiting protrusion engaged in the limiting groove changes, and the length of the writing component 200 exposed in the receiving cavity 110 changes, thereby changing the length of the pen body 100.

[0089] It should be noted that the radial movement of the limiting protrusion along the pen body 100 can be due to its own elastic deformation, or the limiting protrusion as a whole can move radially along the pen body 100. Thus, when the writing component 200 moves axially along the pen body 100, the limiting protrusion can move radially along the pen body 100 until one of the limiting protrusions engages with the limiting groove. The cooperation of the two can provide a certain resistance to the movement of the writing component 200 relative to the pen body 100 along the axial direction of the pen body 100, so as to ensure the normal writing of the electronic pen.

[0090] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. An electronic pen, characterized in that, include: Pen body; The first electrode and the second electrode are both connected to the pen body and located at the same end of the pen body. Along the radial direction of the pen body, the first electrode and the second electrode are arranged at intervals. The first electrode can project a first projection area on the surface of the touch screen, and the second electrode can project a second projection area on the surface of the touch screen.

2. The electronic pen according to claim 1, characterized in that, Along the axial direction of the pen body, the first electrode and the second electrode extend parallel to each other.

3. The electronic pen according to claim 1 or 2, characterized in that, The first electrode and the second electrode are arranged symmetrically with respect to the axis of the pen body.

4. The electronic pen according to claim 1, characterized in that, The electronic pen includes a writing component. Along the axial direction of the pen body, the writing component has a writing end at one end away from the pen body. At least one of the first electrode and the second electrode has a tip at one end facing the writing end. The cross-sectional area of ​​the tip gradually decreases along the direction close to the writing end.

5. The electronic pen according to claim 1, characterized in that, The electronic pen also includes a shielding coating, which is applied to the side of the first electrode facing the second electrode. And / or, the shielding coating is applied to the side of the second electrode facing the first electrode.

6. The electronic pen according to claim 1 or 5, characterized in that, The electronic pen also includes a shielding component, at least a portion of which is located between the first electrode and the second electrode.

7. The electronic pen according to claim 1, characterized in that, The electronic pen also includes an erasing component, which includes a first pressure-sensitive element and a third electrode. The pen body has a receiving cavity in which the first pressure-sensitive element is located along the axial direction of the pen body. The third electrode is located at one end away from the first electrode and the second electrode and is movable relative to the pen body. The erasing component has an erasing mode in which the third electrode abuts against the first pressure-sensitive element and can be coupled close to the touch screen to erase the writing.

8. The electronic pen according to claim 7, characterized in that, The erasure assembly also includes a conductive element configured to be electrically connected to the main control board; The erasing assembly also has a sleep mode, in which the first pressure-sensitive element abuts against the conductive element and is separated from the third electrode; in the erasing mode, the first pressure-sensitive element is separated from the conductive element.

9. The electronic pen according to claim 7, characterized in that, The electronic pen also includes an auxiliary electrode and / or an inertial sensor. The pen body has a receiving cavity, and at least a portion of the auxiliary electrode and / or the inertial sensor is located in the receiving cavity. The auxiliary electrode and / or the inertial sensor are used to cooperate with the first electrode and the second electrode to detect the posture of the electronic pen.

10. The electronic pen according to claim 1, characterized in that, The electronic pen also includes a writing component. Along the radial direction of the pen body, one of the pen body and the writing component is provided with a limiting groove, and the other is provided with a limiting protrusion. Along the axial direction of the pen body, the writing component is movable relative to the pen body. The limiting groove and the limiting protrusion are multiple in number and are distributed at intervals along the axial direction of the pen body. The limiting protrusion is configured to be driven to move radially along the pen body.

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