Active stylus with physical writing capabilities

Abstract

To provide an active stylus having a physical writing function.SOLUTION: An active stylus disclosed herein comprises: a tip shell 6 including a first opening and a second opening 61; and a first electrode 1 including a first end 12 protruding through the first opening of the tip shell and a second end 11 protruding through the second opening 61 of the tip shell to enter a main body housing D of the active stylus, where the first electrode contains a conductive material. The tip shell 6 contains a non-conductive material. The first end 12 of the first electrode 1 is configured to leave colored traces on an object by physical friction caused between the first end 12 of the first electrode 1 and the object.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The subject matter herein relates generally to an active stylus, and more specifically, to an active stylus having physical writing functionality. [Background technology]

[0002] With the development of various electronic devices, many electronic devices such as smartphones and tablets use touch panels as operation interfaces. In order to realize the control of these electronic devices, styluses have emerged as a necessity. A stylus is a pen-shaped tool, and a user operates the stylus on a touch panel to execute command input to the electronic device. The current stylus only has an electronic trace writing ability based on signal interaction, and does not have a physical writing ability. Summary of the Invention [Problem to be solved by the invention]

[0003] It is an object of the present disclosure to provide an active stylus with physical writing functionality. [Means for solving the problem]

[0004] In order to achieve the above object, the present application provides an active stylus, the active stylus including a tip shell and a first electrode, the tip shell including a first opening and a second opening, the tip shell including a non-conductive material, the first electrode including a first end protruding from the first opening of the tip shell and a second end protruding from the second opening of the tip shell and entering a body housing of the active stylus, the first electrode including a conductive material, and the first end of the first electrode configured to leave colored traces on the object due to physical friction generated between the first end of the first electrode and the object.

[0005] It should be understood that the description in this section is not intended to identify key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will be readily apparent from the following specification. [Brief description of the drawings]

[0006] In the accompanying drawings, unless otherwise specified, the same reference numerals refer to the same or similar parts or elements throughout the several accompanying drawings. The accompanying drawings are not necessarily drawn to scale. It should be understood that the accompanying drawings illustrate only some embodiments disclosed by the present disclosure and are not intended to limit the scope of the present disclosure.

[0007] [Figure 1] FIG. 1 is a schematic diagram of an active stylus according to one embodiment of the present disclosure. [Diagram 2] FIG. 2 is a schematic exploded view of a portion of an active stylus according to one embodiment of the present disclosure. [Figure 3A] FIG. 2 is a schematic exploded view of a portion of an active stylus according to one embodiment of the present disclosure. [Figure 3B] FIG. 2 is a schematic exploded view of a portion of an active stylus according to one embodiment of the present disclosure. [Figure 4A] FIG. 2 is a schematic exploded view of a first electrode according to one embodiment of the present disclosure. [Figure 4B] FIG. 2 is a schematic cross-sectional view of a tip shell according to one embodiment of the present disclosure. [Diagram 5] FIG. 2 is a schematic exploded view of a second electrode according to one embodiment of the present disclosure. [Figure 6] FIG. 2 is a schematic exploded view of a portion of an active stylus according to one embodiment of the present disclosure. [Figure 7] FIG. 2 is a schematic exploded view of a portion of an active stylus according to one embodiment of the present disclosure. [Figure 8] FIG. 2 is a schematic cross-sectional view of a portion of an active stylus according to one embodiment of the present disclosure. [Figure 9]FIG. 2 is a schematic cross-sectional view of a portion of an active stylus according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] For ease and clarity of description, reference numerals are appropriately repeated in different figures to indicate corresponding or similar elements. In addition, many specific details are described to facilitate detailed understanding of the embodiments described herein. However, it will be understood by those skilled in the art that the embodiments described herein can be practiced without these specific details. In other instances, detailed descriptions of methods, procedures, and components have been omitted so as not to obscure relevant interrelated features described. In addition, this description should not be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale, and the proportions of the parts have been exaggerated to better illustrate the details and features of the present disclosure.

[0009] Several definitions that apply throughout this disclosure are provided.

[0010] The term "coupled" is defined as a direct or indirect connection through an intervening component, and is not necessarily limited to a physical connection. A connection may be one in which objects are permanently connected or releasably connected. The term "outer" refers to an area outside the outermost extent of a physical object. The term "inner" indicates that at least a portion of an area is partially contained within a boundary formed by an object. The term "substantially" is defined as essentially conforming to a particular dimension, shape, or other term that substantially qualifies an object, such that the object need not be precise. For example, substantially cylindrical means that an object resembles a cylinder, but may have one or more deviations from a true cylinder. The term "including," when used, means "including, but not necessarily limited to," and specifically indicates an open-ended inclusion or membership in such combinations, groups, series, and the like.

[0011] As shown in Figures 1-9, the present disclosure provides an active stylus with a physical writing function. The active stylus includes a body housing D, a tip shell 6, and a first electrode 1. In some embodiments, the tip shell 6 includes a non-conductive material. The tip shell 6 includes a first opening 62 and a second opening 61. The first electrode 1 includes a conductive material and is mounted within the tip shell 6. A first end 12 of the first electrode 1 protrudes from the first opening 62 and a second end 11 protrudes from the second opening 61 of the tip shell 6 and enters the body housing of the active stylus.

[0012] In this embodiment, the first end 12 of the first electrode 1 comprises a writable conductive material. In some embodiments, the writable conductive material comprises a graphite alloy. In some embodiments, the writable conductive material comprises a zinc alloy. In some other embodiments, the writable conductive material comprises a lead alloy.

[0013] Thus, in some embodiments, the first end 12 of the first electrode 1 can leave a colored trace on the object due to physical friction between the first end 12 of the first electrode 1 and the object. In some embodiments, the object comprises a piece of paper. In some embodiments, the object comprises a wall. In some embodiments, the object comprises a whiteboard.

[0014] Thus, the first electrode 1 of the active stylus of the present disclosure includes at least two writing functions.

[0015] The first electrode 1 of the active stylus of the present disclosure is configured to transmit wireless touch control signals to an electronic device having a touch control panel, such as a tablet, while the active stylus is applied to the electronic device. Then, in response to the received wireless touch control signals, the electronic device can determine the position of the active stylus on the touch control panel, the tilt of the active stylus, and other information of the active stylus. Thus, a trace of the active stylus caused by the touch control interaction between the active stylus and the touch panel of the electronic device is displayed on the touch control panel.

[0016] Additionally, when a user uses the active stylus of the present disclosure to write on an object, such as a piece of paper, the writable conductive material of the first end 12 is left behind on the piece of paper due to physical friction between the first end 12 and the piece of paper, forming a colored trace on the piece of paper.

[0017] Thus, the active stylus of the present disclosure provides signal-based electronic writing and control capabilities, and also provides non-electronic writing on paper, walls, and other writing surfaces based on physical contact.

[0018] In this embodiment, the tip shell 6 comprises a non-conductive material that does not affect the signal transmission of the first electrode 1, such as rubber or silicone.

[0019] In some embodiments, the first end 12 of the first electrode 1 comprises a writable conductive material that enables the active stylus to have both electronic writing and physical writing capabilities.

[0020] In some embodiments, the first electrode 1 includes a non-writer electrode P1 and a writer electrode P2. A first end of the writer electrode P2 protrudes from the first opening 62 and is used to perform electronic writing and physical writing functions. The non-writer electrode P1 includes an end away from the end of the writer electrode P2, which end of the non-writer electrode P1 is a second end 11 of the first electrode 1. The end of the non-writer electrode P1 includes a receiving cavity 13 that receives the second end of the writer electrode P2. In this configuration, the writer electrode P2 is replaceable if it becomes excessively worn.

[0021] In some embodiments, the write electrode P2 comprises a writable conductive material and the non-write electrode P1 comprises a conductive material, such that the material of the non-write electrode P1 is different from the material of the write electrode P2.

[0022] In some embodiments, the material of the write electrode P2 comprises a graphite alloy. In some embodiments, the material of the write electrode P2 comprises a zinc alloy. In some embodiments, the material of the write electrode P2 comprises a lead alloy. Also, in some embodiments, the material of the non-write electrode P1 comprises an aluminum alloy. In some embodiments, the material of the non-write electrode P1 comprises stainless steel. In some other embodiments, the material of the non-write electrode P1 comprises copper. Thus, the amount of writable conductive material is reduced in the manufacture of the first electrode 1. Also, in some embodiments, the non-write electrode P1 comprises a writable conductive material.

[0023] In some embodiments, the first end of the write electrode P2 includes a frustum 121, a first end surface of the frustum 121 includes an arcuate surface 122, and a smooth transition surface from the arcuate surface 122 to the frustum 121. In this embodiment, the second end surface of the frustum 121 includes a cylinder 14. And, the end of the cylinder 14 away from the frustum 121 is the second end of the write electrode P2. In this embodiment, the shape of the write electrode P2 ensures smooth writing and prevents scratches on the electronics. Furthermore, the smooth transition surface from the arcuate surface 122 to the frustum 121 also enhances the signal transmission of the write electrode P2.

[0024] In some embodiments, the tip shell 6 comprises a frusto-conical hollow shell with a smooth transition from the outer surface of the frusto-conical hollow housing 121 to the outer surface of the frusto-conical hollow housing, providing a clean appearance to the active stylus.

[0025] In some embodiments, the chip shell 6 includes a truncated cone-shaped housing, a first limit ring 63, and a second limit ring 64. The chip shell 6 further includes a first opening 62 formed in a cross section of the chip shell 6 and a second opening 61 formed in a bottom portion of the chip shell 6. The first limit ring 63 is formed inside the chip shell 6 and is adjacent to the first opening 62. The second limit ring is formed inside the chip shell 6 and is located between the first opening 62 and the second opening 61. The first limit ring 63 is configured to prevent the write electrode P2 from being attached or detached. In addition, the first electrode 1 is fixed by an internal structure of the chip shell 6.

[0026] 4A and 4B, in this embodiment, the outer diameter of the receiving cavity 13 of the first electrode 1 is larger than the inner diameter of the first limit ring 63. The outer diameter of the receiving cavity 13 of the first electrode 1 is also larger than the inner diameter of the second limit ring 64. Thus, in this embodiment, the first electrode 1 is fixed by the first limit ring 63 and the second limit ring 64. The end of the cylinder 14 adjacent to the truncated cone 121 includes a recess (not shown) that is used to receive the first limit ring 63 and prevent the write electrode P2 from being attached or detached.

[0027] In some embodiments, the active stylus 100 further includes a body housing D. The body housing D includes a pin holder 2 and a second electrode 7. The second electrode 7 includes a first insulating ring 73. The first insulating ring 73 is configured to insulate the first electrode 1. A first end of the second electrode 7 is located within the body housing D, and a second end of the second electrode 7 protrudes from the body housing 7. In this embodiment, the second electrode 7 includes a cylindrical electrode. Also, the first insulating ring 73 is fitted within the second electrode 7. The first electrode 1 can pass through the first insulating ring 73.

[0028] In addition, the second end of the first electrode 1 penetrates the second electrode 7 and is held by the holding portion 21 of the pin holder 2, and the second end of the second electrode 7 is removably attached within the tip shell 6.

[0029] As shown in Fig. 1, the exterior of the active stylus includes a tip shell 6 and a body housing D. Therefore, the aesthetic appearance and simplicity of the active stylus are improved. Since the second electrode 7 is not exposed to the outside (exposed to air), the service life of the second electrode 7 is extended.

[0030] Also, in this embodiment, the second end of the first electrode 1 is removably held by the holding portion 21 of the pin holder 2. The second end of the second electrode 7 is removably attached within the tip shell 6. The second electrode 7 is detachable from the holding portion 21, which means that the second electrode 7 is detachable from the main body housing D. In this embodiment, the second electrode 7 is also detachable from the tip shell 6. Therefore, the first electrode 1 and the tip shell 6 are replaceable.

[0031] As shown in FIG. 1, the main housing D includes a hollow cylindrical portion and a hollow circular truncated portion. The hollow circular truncated portion narrows toward the tip shell 6, and a third opening is formed at the end of the hollow cylindrical portion and away from the hollow circular truncated portion. The tip shell 6 includes a truncated cone-shaped housing and a second opening 61 formed at the bottom of the tip shell 6. The third opening is used to fit with the second opening 61.

[0032] In some embodiments, the first electrode 1 is configured to transmit a first wireless signal and the second electrode 7 is configured to transmit a second wireless signal. In this embodiment, the frequency of the first wireless signal is different from the frequency of the second wireless signal. Thus, the position, tilt angle and other relevant information are determined in response to the first and second wireless signals received by the electronic device, e.g., a tablet.

[0033] In some embodiments, the active stylus further includes a second insulating ring 72, and the second electrode 7 is fitted within the second insulating ring 72. The outer peripheral surface of the second insulating ring 72 abuts against the third opening, and the second electrode 7 does not contact the main body housing D. Therefore, the second electrode 7 is fixed without moving to the main body housing D.

[0034] In some embodiments, the body housing D includes a metallic material. Since the second electrode 7 does not contact the body housing D, in this embodiment, the electrical signal of the second electrode 7 does not flow to ground through the body housing D and the human body.

[0035] In some embodiments, the second electrode 7 includes a first cylindrical portion 71a and a second cylindrical portion 71b. The first cylindrical portion 71a is used to fix a first end of the second electrode 7 in the main housing D. The second cylindrical portion 71b is coaxial with the first cylindrical portion 71a. The outer radius of the second cylindrical portion 71b is shorter than the outer radius of the first cylindrical portion 71a. An annular step is formed at the joint between the first cylindrical portion 71a and the second cylindrical portion 71b. The second insulating ring 72 is fitted to the outer peripheral surface 71b2 of the second cylindrical portion 71b. The first end of the second insulating ring 72 abuts against the annular step, and the second end of the second insulating ring 72 abuts against the third opening. Thus, the second insulating ring 72 is fixed to the third opening, and the first cylindrical portion 71a does not contact the main housing D.

[0036] 9, an inner surface 71b1 of the second cylindrical portion 71b is fitted into the outer peripheral surface of the first insulating ring 73. The inner radius of the second cylindrical portion 71b is shorter than the inner radius of the first cylindrical portion 71a.

[0037] Therefore, a part of the second electrode 7 is located within the main housing D, and another part of the second electrode 7 is located within the tip shell 6. The second electrode 7 is also insulated from the main housing D and the first electrode 1. In addition, a second insulating ring 72 is fixed in the third opening and abuts against the annular step, preventing the second electrode 7 from loosening in the direction of the tip shell 6.

[0038] Additionally, the second cylindrical portion 71b includes a cylindrical electrode tip 715 and a cylindrical conductive portion 716. The cylindrical conductive portion 716 includes a first end coupled to the first cylindrical portion 71a and a second end coupled to the first end of the cylindrical electrode tip 715. The outer radius of the first end of the cylindrical electrode tip 715 is greater than the outer radius of the second end of the cylindrical electrode tip 715. The smooth transition from the outer periphery of the first end of the cylindrical electrode tip 715 to the outer periphery of the second end of the cylindrical electrode tip 715 is a sloped outer periphery.

[0039] In some embodiments, the tip shell 6 includes an inner truncated cone receiving portion. The tip of the inner truncated cone receiving portion is used to encase the first end of the first electrode 1. The inner wall located at the middle of the inner truncated cone receiving portion abuts against the inclined outer peripheral surface of the cylindrical electrode tip 715. In addition, in this embodiment, the cylindrical electrode tip 715 is fixed in the tip shell 6, and the tip shell 6 moves along the axial direction of the active stylus. Furthermore, the outer peripheral surface of the cylindrical electrode tip 715 is an inclined outer peripheral surface, and the wireless signal of the second electrode 7 is efficiently transmitted.

[0040] 4A, the end of the first electrode 1 includes a truncated cone 121 and an arc surface 122. A smooth transition surface is also formed from the arc surface 122 to the truncated cone 121, so that the wireless signal transmitted by the first electrode 1 is transmitted efficiently, and the first electrode 1 is fixed in the chip shell 6.

[0041] In some embodiments, the first gap is located between the tip head of the cylindrical electrode tip 715 and the frusto-conical receiving portion, and the second gap is located between the second opening and the third opening. Therefore, the buffer space provided by the first gap and the second gap significantly reduces the probability of damage to the force sensor of the active stylus.

[0042] In some embodiments, the active stylus further includes an inner case 9 made of a non-metallic material. The inner case 9 is fixed in the main housing D. A first end of the inner case 9 is coupled to the first cylindrical portion 71a to fix the second electrode 7. The printed circuit board (M, F), the fixing portion S for holding the pin holder 2, and the pin holder 2 are located in the inner case 9. The printed circuit board M is electrically coupled to the first electrode 1 and the second electrode 7. The printed circuit board M provides a first signal to the first electrode 1 and a second signal to the second electrode 7. The end of the fixing portion S facing the tip shell 6 includes a receiving portion. The first end of the pin holder 2 is received in the receiving portion, and the second end of the pin holder 2 is used to hold the first electrode 1.

[0043] In some embodiments, the main housing D is made of a metallic material. Since the inner case 9 is made of a non-metallic material, the conductive components in the inner case 9 are insulated from the main housing D. In this embodiment, the metallic material includes copper, aluminum, stainless steel, aluminum alloys, and titanium alloys.

[0044] The fixed part S includes a main body part and an extension part. An end of the main body part of the fixed part S includes a receiving part, and an opening of the receiving part faces the tip shell 6. The extension parts of the fixed part S are located on both sides of the main body part of the fixed part S. The extension parts are used to cooperate with a buckle structure in the inner case 9. Then, the fixed part S is disposed at a predetermined position in the inner case 9. Therefore, the fixed part S is fixed in the inner case 9 by the main body part and the extension part of the fixed part S. Since the receiving part holds the pin holder 2, the pin holder 2 can only move slightly along the direction of the active stylus.

[0045] Further, the force sensor S1 is located at the bottom of the receiving part. When the tip shell 6 is pressed, the first electrode 1 moves relatively along the axial direction of the active stylus, and the pin holder 2 is driven to move relatively along the axial direction of the active stylus. Thus, the force sensor S1 is pressed and a stress is generated. The stress is detected by the force sensor S1, and a detection signal is generated in response to the detected stress. Then, the detection signal is converted into a wireless signal transmitted to an external electronic device having a touch screen. Information is displayed on the touch screen in response to the received wireless signal.

[0046] In some embodiments, the pin holder 2 includes a stress transfer part 22, a holding part 21, a first spring (not shown), a second spring 3, and a third spring 5. In this embodiment, the stress transfer part 22 includes a receiving cavity having an opening toward the fixed part S, and a ring block 23. A concave ring 24 is formed between the peripheral surface of the stress transfer part 22 and the peripheral surface of the holding part 21. The snap ring 4 is attached to the concave ring 24. An end of the first spring abuts against the bottom of the receiving cavity. The other end of the first spring abuts against the slider 221, which abuts against the force sensor S1. The second spring 3 is fitted into the peripheral surface of the stress transfer part 22 and abuts against the ring block 23 and the fixed part S, respectively. The second spring 3 also includes an extension portion coupled to the printed circuit board M. The third spring 5 is fitted onto the circumferential surface of the stress transmission part 22 and abuts against the ring block 23 and the snap ring 4. One side of the snap ring 4 abuts against the third spring 5, and the other side of the snap ring 4 abuts against a step 92 on the inner wall of the inner case 9.

[0047] During use of the active stylus, the first electrode 1 is pressed, generating stress, which is transmitted along the axis of the active stylus through the first electrode 1, the holding portion 21, and the stress transmission portion 22 to compress the first spring. Thus, the stress is transmitted to the force sensor through the slider 221. The second spring 3 is always in a pre-compressed state, ensuring that the second spring 3 is in physical contact with the ring block 23. Also, since the second spring 3 is always in a pre-compressed state, the slider 221 is always in contact with the force sensor S1. In some embodiments, the slider is always in close proximity to the force sensor S1. Furthermore, the pin holder 2 of the present disclosure efficiently detects the stress caused by the user's writing pressure, and the electronic signal transmitted from the printed circuit board M is reliably transmitted.

[0048] In some embodiments, the active stylus of the present disclosure further includes a fourth spring 8 in physical contact with the first cylindrical portion 71a. The fourth spring 8 includes an extension portion coupled to the printed circuit board M.

[0049] In some embodiments, the second end of the inner case 9 includes a male thread 91. A step is formed between the male thread 91 and an area adjacent to the male thread 91 on the outer surface of the inner case 9. The first cylindrical portion 71a also includes a female thread 711. Thus, the second end of the inner case 9 is screwed into the first cylindrical portion 71a by the male thread 91 and the female thread 711. The fourth spring 8 is fitted to the outer surface of the inner case 9 and abuts against the first cylindrical portion 71a and the step formed between the male thread 91 and an area adjacent to the male thread 91 on the outer surface of the inner case 9, respectively. The fourth spring 4 is always in a compressed state, so that the fourth spring 4 is in physical contact with the second cylindrical portion 71b, ensuring that the electronic signal transmitted from the printed circuit board M is reliably transmitted. The second electrode 7 is also fixed by the inner case 9 and the screw structure.

[0050] In some embodiments, the body housing D is constructed from a metallic material that provides signal shielding functionality.

[0051] In some embodiments, the main housing D is electrically connected to a ground terminal of an internal circuit board to form a loop.

[0052] In some embodiments, the active stylus further includes a vibrator which can enhance the user experience and make it more enjoyable to use.

[0053] In some embodiments, the active stylus further includes other components, such as a battery, a magnet, a button, a light, etc.

[0054] The following is a signal transmission method of the active stylus of one embodiment of the present disclosure. A first signal is transmitted from the printed circuit board M to the first electrode 1 via the second spring 3 and the pin holder 2. The first signal is converted into a first wireless signal, and the first wireless signal is transmitted by the first end 12 of the first electrode 1. A second signal is transmitted from the printed circuit board M to the second electrode 7 via the fourth spring 8. The second signal is converted into a second wireless signal, and the second wireless signal is transmitted by the cylindrical electrode tip 715 at the second end of the second electrode 7.

[0055] In some embodiments, the tip shell 6 is made of a non-conductive material. In some embodiments, the body housing D is made of a metallic material and the inner shell 9 is made of a non-metallic material. In some embodiments, the fixed portion S is made of a non-metallic material and the ground terminals of the printed circuit boards (M and F) are connected to the body housing D.

[0056] The above-mentioned illustrated and described embodiments are only exemplary and do not limit the scope of the patent application of the present disclosure. Therefore, such numerous details are not shown and described. Although the above description describes numerous features and advantages of the present technology together with the details of the structure and function of the present disclosure, the present disclosure is only exemplary, and changes can be made in details, particularly in the shape, size, and arrangement of each member within the principles of the present disclosure, as long as they are defined in the broad general meaning of the terms used in the claims. Therefore, it should be understood that the above-mentioned embodiments can be variously modified within the scope of the claims.

Claims

1. An active stylus having a physical writing function, a chip shell comprising a non-conductive material, the chip shell including a first opening, a second opening, a first limit ring, and a second limit ring, the first opening being formed in a cross section of the chip shell, the second opening being formed in a cross section of the chip shell, the first limit ring being formed inside the chip shell and adjacent the first opening, and the second limit ring being formed inside the chip shell and located between the first opening and the second opening; a first electrode including a write electrode and a non-write electrode, a first end of the write electrode protruding from the first opening of the tip shell, a second end of the write electrode received by a non-write electrode receiving cavity, an end of the non-write electrode away from the write electrode protruding from the second opening of the tip shell and including a second end that enters a body housing of the active stylus, the first electrode including a conductive material; Equipped with the write electrode is configured to leave a colored trace on the object by physical friction between the write electrode and the object; The first limit ring is configured to prevent detachment of the write electrode.

2. The active stylus of claim 1 , wherein the first end of the first electrode comprises a writable conductive material.

3. The active stylus of claim 2 , wherein the writable conductive material comprises a graphite alloy.

4. The active stylus of claim 2 , wherein the writable conductive material comprises a zinc alloy.

5. The active stylus of claim 2 , wherein the writable conductive material comprises a lead alloy.

6. The active stylus of claim 1 , wherein the write electrodes comprise a writable conductive material and the non-write electrodes comprise a conductive material.

7. The active stylus of claim 1 , wherein the write electrodes comprise a writable conductive material and the non-write electrodes comprise a writable conductive material.

8. The first end of the write electrode a first end surface of the frustum including an arcuate surface and a smooth transition surface from the arcuate surface to the frustum; The active stylus of claim 1 , wherein a second end surface of the frustum comprises a cylinder, the end of the cylinder away from the frustum being the second end of the write electrode.

9. The active stylus of claim 1 , wherein the tip shell comprises a frusto-conical hollow housing, and a smooth transition is from an outer periphery of the frusto-conical hollow housing to an outer periphery of the frusto-conical hollow housing.

10. The active stylus of claim 1 , wherein the first electrode is configured to transmit a wireless signal.

11. The main body housing includes: A pin holder and a second electrode including a first insulating ring configured to insulate the first electrode, the second electrode having a first end located within the body housing and a second end protruding from the body housing; Including, 2. The active stylus of claim 1, wherein the second end of the first electrode penetrates the second electrode and is held by a holding portion of the pin holder, and the second end of the second electrode is removably attached within the tip shell.

12. The active stylus of claim 11 , wherein the second electrode comprises a cylindrical electrode.

13. The active stylus of claim 1 , wherein the object comprises a sheet of paper.

14. The active stylus of claim 2 , wherein the writable conductive material is left on the object by physical friction between the first electrode and the object to form a colored trace on the object.

Images