Stylus pen
The stylus pen addresses the challenges of signal transmission and reception in touchscreen devices by using an inductor and capacitor design with movable members, ensuring efficient and durable signal exchange and supporting both contact and hovering functions.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- HIDEEP INC
- Filing Date
- 2025-01-31
- Publication Date
- 2026-07-23
AI Technical Summary
Existing stylus pens for electronic devices with touchscreens face challenges in efficiently transmitting and receiving magnetic signals due to the thickness and complexity of digitizers, which can lead to deformation and damage when used in foldable or flexible devices, and require additional components that increase manufacturing costs.
A stylus pen design incorporating an inductor section, capacitor section, and movable members with elastic connections that adjust capacitance based on pressure, allowing for efficient signal transmission and reception without the need for additional modules, enabling thinner and more durable touchscreen interfaces.
The stylus pen effectively transmits and receives electromagnetic signals, supporting both contact and hovering functions, while reducing the thickness and complexity of touchscreen components, and enhancing durability and cost-effectiveness.
Smart Images
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Abstract
Description
Technical Field
[0001] This disclosure relates to a stylus pen.
Background Art
[0002] Various terminals such as mobile phones, smart phones, tablets, laptop computers, digital broadcast terminals, PDAs (Personal Digital Assistants), PMPs (Portable Multimedia Players), and navigations are equipped with touch sensors.
[0003] The touch sensor in such a terminal can be located on a display panel representing an image or in an area of the terminal body. When the user touches the touch sensor to interact with the terminal, the terminal can provide an intuitive user interface to the user.
[0004] For precise touch input, the user can use a stylus pen. Such a stylus pen can transmit and receive signals to and from the touch sensor via electrical and / or magnetic means.
Summary of the Invention
Problems to be Solved by the Invention
[0005] One embodiment provides a stylus pen for effectively receiving and transmitting magnetic signals received from an electronic device and magnetic signals transmitted to the electronic device.
Means for Solving the Problems
[0006] A stylus pen according to one embodiment for solving such technical problems may include an inductor section, a capacitor section including a plurality of first capacitors connected in parallel with the inductor section, a connecting member including a first signal line connected to one end of each of the plurality of first capacitors, a movable member including a second signal line connected to the first signal line when in contact with the connecting member, a conductive elastic member connected to the second signal line, and a second capacitor connected between the elastic member and the other end of each of the plurality of first capacitors.
[0007] A touch system according to one embodiment may include a stylus pen including an inductor portion including an inductor connecting portion, a stylus pen including a capacitor portion including a movable member moved by the inductor connecting portion and an elastic member connected to the movable member at the upper end of the movable member, and a touch screen including a touch electrode layer that receives electromagnetic signals resonated by the stylus pen.
[0008] A stylus pen according to one embodiment may include a capacitor region containing a plurality of capacitors, an elastic member located at the lower end of the capacitor region and in contact with the capacitor region, a movable member located at the lower end of the elastic member and connected between the elastic member and an inductor portion, a connecting member formed while enclosing the outer casing of the capacitor region, the elastic member and the movable member, and a contact region where the movable member and the connecting member come into contact. [Brief explanation of the drawing]
[0009] [Figure 1] This is a conceptual diagram showing a stylus pen and electronic devices. [Figure 2] This diagram schematically illustrates the signal transmission operation between a stylus pen and an electronic device. [Figure 3] This diagram schematically illustrates the signal transmission operation between a stylus pen and an electronic device. [Figure 4] This diagram schematically illustrates the signal transmission operation between a stylus pen and an electronic device. [Figure 5]This figure shows a stylus pen as an example of a comparative case. [Figure 6] This figure shows the elements contained within the housing of a stylus pen in a comparative example. [Figure 7] This diagram shows the contact state between the connecting member and the moving member in the hovering state. [Figure 8] This is a circuit diagram of a stylus pen as an example. [Figure 9] This diagram shows the contact state between the connecting member and the moving member in the hovering state. [Figure 10] This is a circuit diagram of a stylus pen as an example. [Figure 11] This figure shows a stylus pen according to one embodiment. [Figure 12] This figure shows a stylus pen according to one embodiment. [Figure 13] This diagram shows the pressure-sensing and connecting parts of a stylus pen. [Figure 14] This is a diagram showing the connecting members. [Figure 15] This is a diagram showing the movable members. [Figure 16] This figure shows a stylus pen in which a connecting member and a moving member are in contact according to one embodiment. [Figure 17] This is a circuit diagram of a stylus pen in a hovering state according to one embodiment. [Figure 18] This figure shows a stylus pen in which a connecting member and a moving member are in contact according to one embodiment. [Figure 19] This is a circuit diagram of a stylus pen in a hovering state according to one embodiment. [Figure 20] This figure shows a stylus pen in which the connecting member and the movable member are separated according to one embodiment. [Figure 21] This is a circuit diagram of a stylus pen in contact state according to one embodiment. [Modes for carrying out the invention]
[0010] Hereinafter, with reference to the accompanying drawings, various embodiments of the present invention will be described in detail so that those with ordinary knowledge in the technical field to which the present invention pertains can easily implement it. The present invention can be embodied in various different forms and is not limited to the embodiments described in this specification.
[0011] To clearly explain the present invention, parts not related to the explanation are omitted, and the same reference numerals are used for the same or similar components throughout the specification.
[0012] Also, throughout the specification, when a certain part "includes" a certain component, this means that, unless otherwise stated to the contrary, it does not exclude other components and may further include other components.
[0013] FIG. 1 is a conceptual diagram showing a stylus pen and an electronic device.
[0014] Referring to FIG. 1, the stylus pen 10 can receive a signal output from the electronic device 20 or the touch screen 30 near the touch screen 30 of the electronic device 20 and transmit a signal to the touch screen 30.
[0015] FIGS. 2 to 4 are diagrams schematically showing the signal transmission operation between the stylus pen (10 in FIG. 1) and the electronic device (20 in FIG. 1).
[0016] Referring to FIG. 2, the touch screen 30a can include a digitizer 31, a display panel 32, a touch electrode layer 33, and a window 34. Among passive stylus pens, for the EMR (Electro - Magnetic Resonance) type pen, if the digitizer 31 transmits a magnetic signal B to the EMR type stylus pen 10, the resonance circuit included in the stylus pen 10 can resonate based on the magnetic signal B. Then, the digitizer 31 can receive the magnetic signal B resonated from the stylus pen 10.
[0017] The digitizer 31 can be attached beneath the display panel 32 and may include a Flexible Printed Circuit Board (FPCB) with multiple conductive antenna loops, and a ferrite sheet that blocks the magnetic field generated by the antenna loops and blocks eddy currents that can be generated by other electrical elements and components when the antenna loops form a magnetic field.
[0018] The FPCB can have multiple antenna loops arranged in multiple layers to sense the position where the resonant signal is input. One antenna loop may have a configuration that overlaps with at least one other antenna loop in the Z-axis direction. This increases the thickness of the FPCB, making it difficult to thin and miniaturize the electronic device 20.
[0019] If such a digitizer 31 is mounted on a foldable / flexible electronic device 20, deformation can occur in the FPCB attached to the folded area when folding occurs. Repeated folding puts stress on the wiring members that form the antenna loop, which can eventually lead to damage to the wiring members. The ferrite sheet can block the influence of the magnetic field generated by the antenna loop on the inside of the electronic device 20. The ferrite sheet is also thick and is prone to deformation when the electronic device 20 is folded, and can be damaged by repeated folding.
[0020] Referring to Figure 3, the touchscreen 30b may include a display panel 32, a touch electrode layer 33, and a window 34.
[0021] When the electrodes of the touch electrode layer 33 transmit a magnetic signal B to the stylus pen 10, the resonant circuit included in the stylus pen 10 can resonate based on the magnetic signal B. The electrodes of the touch electrode layer 33 can receive resonant electromagnetic signals E and / or B from the stylus pen 10. If the electrodes of the touch electrode layer 33 are formed from a metal mesh with low resistance, the magnetic signal from the stylus pen 10 can be detected.
[0022] Similarly, compared to the digitizer 31, the touchscreen 30b does not require additional units or modules to transmit magnetic signals to the stylus pen 10, which allows for a thinner touchscreen 30b and may also be advantageous in terms of manufacturing costs.
[0023] Referring to Figure 4, the touchscreen 30c may include a loop coil 35, a display panel 32, a touch electrode layer 33, and a window 34. When the loop coil 35 transmits a magnetic signal B to the stylus pen 10, the resonant circuit included in the stylus pen 10 can resonate based on the magnetic signal B. Then, the electrodes of the touch electrode layer 33 can receive the resonant electromagnetic signals E and / or B from the stylus pen 10.
[0024] Compared to the digitizer 31, the loop coil 35 does not receive the magnetic signal B for detecting the touch position, resulting in a simpler wiring structure and enabling a thinner touchscreen 30c. This can be advantageous for thinning and miniaturizing the electronic device 20. Furthermore, since the loop coil 35 can be formed in various sizes and positions, such a touchscreen 30c can also be applied to foldable / flexible electronic devices 20.
[0025] The loop coil 35 may include a substrate on which the antenna loop is located and a ferrite sheet. The antenna loop can be formed from a conductive material such as copper or silver. The antenna loop can be located on the same layer as the touch electrode layer 33, in addition to the substrate. In this case, the antenna loop can be formed from a conductive material exhibiting high transmittance and low impedance, such as metal mesh, ITO, graphene, or silver nanowire. The antenna loop can also be located below the window. In this case, the substrate may not be included in the loop coil 35.
[0026] The touch electrode layer 33 may include a plurality of first touch electrodes for detecting touch coordinates in a first direction and a plurality of second touch electrodes for detecting touch coordinates in a second direction intersecting the first direction. In Figure 4, the touch electrode layer 33 is shown as a single layer, but the first and second touch electrodes may be located in different layers, overlap each other, or not overlap each other, and there may be another layer interposed between the first and second touch electrodes, and is not limited to these.
[0027] Figure 5 shows a stylus pen in comparison to the previous example.
[0028] Referring to Figure 5, the stylus pen 10 may include a resonant circuit section 12 within the housing 11. The resonant circuit section 12, as an LC resonant circuit, can resonate with the drive signal output from the touchscreen (30 in Figure 1). The drive signal may include a signal having a frequency corresponding to the resonant frequency of the resonant circuit section 12 (e.g., a sine wave, a square wave, etc.). For example, the resonant circuit section 12 can resonate based on the magnetic signal B received from the digitizer (31 in Figure 2), the touch electrode layer (33 in Figure 3), and the loop coil (35 in Figure 4). For resonance to occur, the resonant frequency of the resonant circuit section 12 and the frequency of the drive signal must be the same or very similar. In this case, the resonant frequency of the stylus pen 10 is determined by the design value of the resonant circuit section 12.
[0029] The elements contained in the stylus pen 10 can be housed in the housing 11. The housing 11 can be cylindrical, polygonal, a columnar shape with at least a curved surface, entasis, frustum of pyramid, circular truncated cone, etc., and is not limited to such shapes. Because the housing 11 is hollow inside, it can house elements of the stylus pen 10, such as the resonant circuit section 12. Such a housing 11 can be made of an insulated material.
[0030] The resonant circuit section 12 may include an inductor section 14 and a capacitor section 13. The inductor section 14 may include a ferrite core 15 through which a core body 17 passes and a coil 16 wound on the outer surface of the ferrite core 15. The ferrite core 15 may have, for example, a cylindrical ferrite material with an axial through-hole of a predetermined diameter (e.g., 1 mm) formed therein for inserting and passing the core body 17. The coil 16 may be wound over the entire axial length of the ferrite core 15, or over a portion of its length. The coil 16 may be electrically connected to the capacitor section 13.
[0031] The capacitor section 13 may include multiple capacitors connected in parallel. These multiple capacitors may have different capacitances. The capacitor section 13 can change its structure based on the pressure applied by the stylus pen 10 to the touchscreen 30. For example, the capacitor section 13 can determine the connection state of each of the multiple capacitors based on the pressure applied.
[0032] The core body 17 has one end that can protrude from the ferrite core 15 as a pen tip. The core body 17 can be composed of an electrode core made of a conductor, such as a hard resin mixed with a conductive metal or conductive powder.
[0033] Figure 6 shows the elements included in the housing of a stylus pen according to a comparative example.
[0034] Referring to Figure 6, the stylus pen 10 can include a capacitor section 13 and an inductor section 14. The capacitor section 13 can include a plurality of capacitors 131a, 131b, 131c, and 131d and a pressure sensing section 132. The capacitance of the capacitor section 13 can be calculated by summing the capacitances of the plurality of capacitors 131a, 131b, 131c, and 131d. The number of plurality of capacitors 131a, 131b, 131c, and 131d used to calculate the capacitance of the capacitor section 13 can be determined based on the movement of the pressure sensing section 132. This allows the capacitance of the capacitor section 13 to be changed based on the movement of the pressure sensing section 132, and the resonant frequency of the resonant circuit section 12 to be changed by the changed capacitance.
[0035] Multiple capacitors 131a, 131b, 131c, and 131d can be located at the upper end of the capacitor section 13 in the first axis Z direction. The first capacitors 131a, 131b, and 131c among the multiple capacitors 131a, 131b, 131c, and 131d can be connected in parallel to each other between a first contact M1 connected to one end of the inductor section 14 and a second contact M2 connected to the other end of the inductor section 14. One end of the second capacitor 131d among the multiple capacitors 131a, 131b, 131c, and 131d can be connected to the pressure sensing section 132, and the other end of the second capacitor 131d can be connected to the contact M2 to which the other end of the inductor section 14 is connected.
[0036] The pressure sensing unit 132 can disconnect the connection between the first capacitors 131a, 131b, and 131c and the second capacitor 131d, which is connected in parallel, based on the pressure applied by the stylus pen 10 to the touchscreen (30 in Figure 1). The pressure applied by the touchscreen (30 in Figure 1) to the core body 17 causes the pressure sensing unit 132, which is in contact with the core body 17 in the first axis Z direction, to move. When the pressure sensing unit 132 moves, the connection between the second capacitor 131d and the first capacitors 131a, 131b, and 131c can be released. The pressure sensing unit 132 may include a connecting member 61, an inductor connecting part 141, a moving member 62, and movement limiting members 63, 64.
[0037] The connecting member 61 may include a portion of the first signal line 611 and a portion of the second signal line 612. The first signal line 611 can connect the first contact M1 to one end of the inductor section 14 and the fourth contact M4 to the other end of the inductor section 14. The second signal line 612 can connect the third contact M3 to one end of the third signal line 621 and the fourth contact M4 to the other end of the third signal line 621. In this case, the third contact M3 can be connected to the first contact M1 via the fourth signal line 631, and the fourth contact M4 can be connected to the second contact M2 via the fifth signal line 632. The first capacitors 131a, 131b, and 131c can be connected in parallel between the first contact M1 and the fourth contact M4. The second capacitor 131d is placed on the fifth signal line 632 and can be connected in series between the second contact M2 and the fourth contact M4.
[0038] The connecting member 61 may also contain a cavity inside. The inductor connecting portion 141 can move in the first axis Z direction through the cavity.
[0039] The inductor connecting portion 141 can move the movable member 62 in the first axis Z direction. When the stylus pen 10 applies pressure to the touchscreen 30, the pressure transmitted to the core body 17 is transmitted to the movable member 62 via the inductor connecting portion 141, allowing the movable member 62 to move in the first axis Z direction. The inductor connecting portion 141 can pass through the connecting member 61 and connect to the movable member 62. One end of the inductor connecting portion 141 can be connected to the core body 17. The other end of the inductor connecting portion 141 can pass through the connecting member 61 and be physically connected to the movable member 62.
[0040] The movable member 62 may include a third signal line 621. When the movable member 62 and the connecting member 61 are in contact, the third signal line 621 can be electrically connected to the second signal line 612 and the first signal line 611. In this case, the third signal line 621 can be electrically connected to the second signal line 612 at the first contact area 65 and the second contact area 66. When the movable member 62 and the connecting member 61 are in contact, one end of the second capacitor 131d can be connected to one end of the inductor section 14 via the third connection point M3, the fourth signal line 631, and the first contact point M1.
[0041] The movable member 62 can change position based on the pressure applied by the stylus pen 10. The movable member 62 can contact the connecting member 61 in the direction of the first axis Z of the connecting member 61. When the stylus pen 10 applies pressure to the touchscreen 30, the core body 17 can move the movable member 62 in the direction of the first axis Z via the inductor connecting portion 141. At that time, the movable member 62, having been moved in the direction of the first axis Z, can be separated from the connecting member 61.
[0042] When the movable member 62 and the connecting member 61 are separated, the electrical connection between the third signal line 621 and the first signal line 611 and the second signal line 612 can be released. When the movable member 62 and the connecting member 61 are separated, one end of the second capacitor 131d does not need to be connected to the inductor section 14.
[0043] The first movement restricting member 63 and the second movement restricting member 64 can restrict the movement of the moving member 62 in the direction of the first axis Z. When the stylus pen 10 applies pressure to the touchscreen 30, the moving member 62 can move in the direction of the first axis Z. In this case, the first movement restricting member 63 and the second movement restricting member 64 can protect the multiple capacitors 131a to 131d from the movement of the moving member 62 in the direction of the first axis Z.
[0044] The first movement restricting member 63 can contact the moving member 62 in the direction of the first axis Z of the moving member 62. The second movement restricting member 64 can contact the first movement restricting member 63 in the direction of the first axis Z of the first movement restricting member 63.
[0045] When the stylus pen 10 applies pressure to the touchscreen 30, the second movement-restricting member 64 and the first movement-restricting member 63 can come into close contact. In order to eliminate the impact applied from the first movement-restricting member 63 to the second movement-restricting member 64, the shape of the second movement-restricting member 64 can be formed into a hemispherical shape. However, the shape of the second movement-restricting member 64 is not limited to a hemisphere, and can also include an ellipsoid that is not a hemisphere.
[0046] In one embodiment, the first movement-restricting member 63 can be formed in the shape of a rectangular parallelepiped. By forming the first movement-restricting member 63 in the shape of a rectangular parallelepiped, the pressure that the first movement-restricting member 63 applies to the second movement-restricting member 64 can be distributed.
[0047] The inductor section 14 may include a ferrite core 15 through which the core body 17 passes, and a coil 16 wound around the outer surface of the ferrite core 15. The coil 16 wound around the outer surface of the ferrite core 15 can be connected to one end and the other end of the first capacitors 131a, 131b, and 131c. The coil 16 wound around the outer surface of the ferrite core 15 can also be connected to the other end of the second capacitor 131d.
[0048] Figure 7 shows the contact state between the connecting member and the moving member in the hovering state.
[0049] Prior to explaining Figure 7, the hovering state can be defined as a state in which the stylus pen (10 in Figure 1) is not in contact with the touchscreen (30 in Figure 1). However, the distance between the stylus pen 10 and the electronic device (20 in Figure 1) may be close enough to transmit and receive electromagnetic signals E and / or B. That is, the resonant circuit portion of the stylus pen 10 (12 in Figure 5) can receive magnetic signals from the electronic device (20 in Figure 1).
[0050] The hovering state can also mean a state in which the stylus pen 10 is in contact with the touchscreen 30, but the pressure applied to the touchscreen 30 is less than approximately 1g more than the weight of the stylus pen. Conversely, the contact state can mean a state in which pressure corresponding to a weight of approximately 1g or more more than the weight of the stylus pen 10 is applied to the touchscreen 30.
[0051] A stylus pen 10 in a hovering state can perform different functions than a stylus pen 10 in a contact state. In a hovering state, the stylus pen 10 can adjust the cursor position or perform specific functions without physical contact with the touchscreen 30. For example, in a hovering state, a cursor or pointer is displayed on the screen, allowing the user to visually confirm the pen's position. Some software can also display preview information for tools and menus. Furthermore, functions different from those in a contact state, such as switching screens via specific gestures like swiping, can be provided in a hovering state.
[0052] Referring to Figure 7, the stylus pen 10 in the hovering state may not be in contact with the touchscreen (30 in Figure 1). As a result, the connecting member 61 can contact the moving member 62, and the second signal line (612 in Figure 6) and the third signal line (621 in Figure 6) can be electrically connected to each other via the first contact area 65 and the second contact area 66. One end and the other end of the first to third capacitors C1 to C3 can all be connected to the inductor section 14. However, one end of the fourth capacitor C4 can be connected to the connecting member 61, and the other end of the fourth capacitor C4 can be connected to the inductor section 14.
[0053] Figure 8 shows the circuit diagram of a stylus pen in a comparative example in the hovering state.
[0054] Referring to Figures 7 and 8, the first contact N1 and the second contact N2 can be electrically connected to each other. As a result, the fourth capacitor C4 can be connected in parallel with the first to third capacitors C1 to C3. By connecting the fourth capacitor C4 in parallel with the capacitor section (13 in Figure 5), the capacitance of the capacitor section 13 can be changed.
[0055] In the hovering state, the resonant circuit section (12 in Figure 5) of the stylus pen (10 in Figure 1) can resonate based on the modified capacitance of the capacitor section 13. In this case, the capacitance of the resonant circuit section 12 can be calculated based on the capacitances of the first to fourth capacitors C1 to C4 connected in parallel. The electronic device (20 in Figure 1) can receive the resonant electromagnetic signals E and / or B from the stylus pen 10. Based on the resonant electromagnetic signals E and / or B, the electronic device 20 can receive the input from the stylus pen 10 in the hovering state.
[0056] Figure 9 shows the contact state between the connecting member and the moving member in the hovering state.
[0057] Referring to Figure 9, the stylus pen (10 in Figure 1) in a hovering state may not be in contact with the touchscreen (30 in Figure 1). However, the connecting member 61 can be in contact with the moving member 62 via the second contact area 66, but not via the first contact area 65. The connecting member 61 and the moving member 62 can be separated from each other with respect to the first contact area 65. In one embodiment, the connecting member 61 and the moving member 62 can be in contact via the first contact area 65 without contacting the second contact area 66 in a hovering state. However, for the sake of explanation, we will continue the explanation assuming that the connecting member 61 is in contact with the moving member 62 only via the second contact area 66.
[0058] Due to production deviations and foreign matter intrusion in the connecting member 61 and the movable member 62, the connecting member 61 and the movable member 62 can only make contact in the second contact area 66 of the first contact area 65 when hovering. This allows the connection between the second signal line (612 in Figure 6) and the third signal line (621 in Figure 6) in the first contact area 65 to be released.
[0059] Figure 10 shows the circuit diagram of a stylus pen in a comparative example in the hovering state.
[0060] Referring to Figures 9 and 10, the first contact N1 and the second contact N2 can be electrically disconnected from each other. As a result, the fourth capacitor C4 can be disconnected from the first to third capacitors C1 to C3. Since the fourth capacitor C4 is disconnected from the capacitor section (13 in Figure 5), the capacitance of the capacitor section 13 in Figure 10 may differ from the capacitance of the capacitor section 13 in Figure 8.
[0061] The resonant circuit section (12 in Figure 5) of the stylus pen (10 in Figure 1) can resonate based on the capacitance of the capacitor section 13. In this case, the capacitance of the resonant circuit section 12 can be calculated based on the capacitances of the first to third capacitors C1 to C3 connected in parallel. The stylus pen 10 can transmit the resonant electromagnetic signals E and / or B, which are in contact with the electronic device (20 in Figure 1), even when hovering. This can cause a malfunction in which the electronic device 20 receives input from the stylus pen 10 in contact.
[0062] Figure 11 shows a stylus pen according to one embodiment.
[0063] Referring to Figure 11, the stylus pen 10 may include the same components as the stylus pen (10 in Figure 5). However, unlike the stylus pen (10 in Figure 5), the capacitor section 13 of the stylus pen 10 may include a connecting section 133.
[0064] The connecting portion 133 can connect the capacitor portion 13 and the inductor portion 14. The connecting portion 133 may include an elastic member that is both elastic and conductive. For example, the elastic member may be a spring made of a metal material such as stainless steel. The elastic member can be placed between any one of the multiple capacitors (131a to 131d in Figure 6) contained inside the capacitor portion 13 and the connecting member (61 in Figure 6).
[0065] Figure 12 shows a stylus pen according to one embodiment.
[0066] The stylus pen 10 in Figure 12 may have the same configuration as the stylus pen (10 in Figure 6). However, the stylus pen 10 can have an elastic member 121 added compared to the stylus pen (10 in Figure 6). The stylus pen 10 will be described focusing on the elastic member 121.
[0067] The elastic member 121 can be connected to the fifth signal line 632 via the fourth contact N4. The second capacitor 131d is positioned on the fifth signal line 632, and the elastic member 121 can be electrically connected to one end of the second capacitor 131d. The other end of the second capacitor 131d can be connected to the inductor section 14 via the second contact N2.
[0068] The elastic member 121 is positioned between the fourth contact N4 and the movable member 62 and can be formed in contact with the movable member 62. The elastic member 121 can be electrically connected to the third signal line 621 included in the movable member 62. As a result, one end of the second capacitor 131d can be electrically connected to the inductor section 14.
[0069] The third signal line 621 can be electrically connected to the second signal line 612 via the first contact region 65 and the second contact region 66. In this case, even if the third signal line 621 is connected to the second signal line 612 in only one of the first contact region 65 and the second contact region 66, one end of the second capacitor 131d can be electrically connected to the inductor section 14.
[0070] The movable member 62 can compress the elastic member 121 in the direction of the first axis Z, and the movable member 62 can move in the direction of the first axis Z depending on the degree of compression of the elastic member 121 compressed in the direction of the first axis Z. The movable member 62 can be controlled by adjusting the strength of the metal material of the elastic member 121, and in this case, the strength of the metal material and the movable member 62 can be inversely proportional.
[0071] When the stylus pen 10 applies pressure to the touchscreen (30 in Figure 1), the pressure transmitted to the core 17 is transmitted to the movable member 62 via the inductor connecting portion 141, causing the movable member 62 to compress the elastic member 121 in the first axis Z direction. At this time, the movable member 62 is separated from the connecting member 61, and the electrical connection between the third signal line 621 and the first signal line 611 and the second signal line 612 can be released. As a result, the connection between one end of the second capacitor 131d and the inductor portion 14 can be released.
[0072] Figure 13 shows the pressure-sensing and connecting parts of the stylus pen.
[0073] Referring to Figure 13, the pressure sensing unit (132 in Figure 12) may include a connecting member 61 and a moving member 62. The connecting unit (133 in Figure 11) may include an elastic member 121. The connecting member 61 and the moving member 62 can come into contact in the first contact area 65. For the sake of explanation, the second contact area (66 in Figure 12) is omitted.
[0074] The connecting member 61 can be formed along the first axis Z direction, enclosing the outer casings of the capacitor region 134, the elastic member 121, and the movable member 62. The elastic member 121 can be positioned between the capacitor region 134 and the movable member 62. The capacitor region 134 can be connected to the upper end of the elastic member 121 in the first axis Z direction. The movable member 62 can be connected to the lower end of the elastic member 121 in the first axis Z direction.
[0075] When the stylus pen 10 applies pressure to the touchscreen (30 in Figure 1), the movable member 62 can move in the direction of the first axis Z. The movable member 62 can compress the elastic member 121 in the direction of the first axis Z. Furthermore, the movable member 62 can move away from the connecting member 61 without contacting it in the first contact area 65.
[0076] Figure 14 shows the connecting members.
[0077] Referring to Figure 14, the connecting member 61 may include a conductive region 661 and a contact region 662. The conductive region 661 may refer to a region coated or plated with a conductive material. The conductor may include metals such as copper, aluminum, and silver, as well as nonmetals such as graphite.
[0078] The contact region 662 may include the region where the connecting member 61 contacts the movable member (62 in Figure 13). The contact region 662 may also be coated or plated with a conductive material. When the connecting member 61 contacts the movable member 62, current may flow from the conductive region 661 to the contact region 662. For example, charge accumulated in the capacitor section (13 in Figure 13) can be transferred from the conductive region 661 to the contact region 662 via the second signal line (612 in Figure 12). Alternatively, charge can be transferred from the contact region 662 to the capacitor section (13 in Figure 13) via the conductive region 661 and the second signal line 612.
[0079] Figure 15 shows the movable member.
[0080] Referring to Figure 15, the moving member 62 may include a conductive region 671. The conductive region 671 can mean a region coated or plated with a conductive material. The conductor may include metals such as copper, aluminum, and silver, as well as nonmetals such as graphite.
[0081] The conductive region 671 may include the region where the movable member 62 comes into contact with the connecting member (61 in Figure 14). If the movable member 62 comes into contact with the connecting member 61, current may flow through the conductive region 671. For example, charge accumulated in the capacitor section (13 in Figure 13) can be transmitted to the conductive region 671 via the second signal line (612 in Figure 12) and the third signal line (621 in Figure 12). Alternatively, charge can be transmitted from the conductive region 671 to the capacitor section 13 via the second signal line 612 and the third signal line 621.
[0082] Figure 16 shows a stylus pen in which a connecting member and a moving member are in contact according to one embodiment.
[0083] Referring to Figure 16, the stylus pen in a hovering state (10 in Figure 1) may not be applying any pressure to the touchscreen (30 in Figure 1). This allows the connecting member 161 to come into contact with the moving member 162 via the first contact area 164 and the second contact area 165.
[0084] One end and the other end of the first to third capacitors C11, C12, and C13 can all be connected to the inductor section 166. However, one end of the fourth capacitor C14 can be connected to the elastic member 163, and the other end of the fourth capacitor C14 can be connected to the inductor section 166. Since the connecting member 161 and the movable member 162 are in contact with each other, the second signal line (612 in Figure 12) and the third signal line (621 in Figure 12) can be electrically connected to each other.
[0085] Figure 17 is a circuit diagram of a stylus pen in a hovering state according to one embodiment.
[0086] Referring to Figures 16 and 17, the elastic member SP can be connected in series with the fourth capacitor C14, and the first contact N1 and the second contact N2 can be connected in series with the elastic member SP. In this case, the first contact N1 and the second contact N2 can be connected in parallel with each other. Since the first contact N1 and the second contact N2 are not open, the fourth capacitor C14 can be connected in parallel with the first to third capacitors C11, C12 and C13 via the first contact N1 or the second contact N2.
[0087] In the hovering state, the resonant circuit section (12 in Figure 11) of the stylus pen (10 in Figure 1) can resonate based on the capacitance of the capacitor section (13 in Figure 11). In this case, the capacitance of the resonant circuit section 12 can be calculated based on the capacitances of the first to fourth capacitors C1 to C4 connected in parallel. The electronic device (20 in Figure 1) can receive the resonant electromagnetic signals E and / or B from the stylus pen (10 in Figure 1). Based on the resonant electromagnetic signals E and / or B, the electronic device 20 can receive the input of the stylus pen 10 in the hovering state.
[0088] Figure 18 shows a stylus pen in which a connecting member and a moving member are in contact according to one embodiment.
[0089] Referring to Figure 18, the stylus pen (10 in Figure 1) in the hovering state may not apply any pressure to the touchscreen (30 in Figure 1). However, due to production deviations of the connecting member 181 and the moving member 182, as well as the penetration of foreign matter, the connecting member 181 and the moving member 182 in the hovering state can only make contact in the second contact area 185 of the first contact area 184 and the second contact area 185.
[0090] Figure 19 is a circuit diagram of a stylus pen in a hovering state according to one embodiment.
[0091] Referring to Figures 18 and 19, the elastic member SP can be connected in series with the fourth capacitor C14, and the first contact N1 and the second contact N2 can be connected in series with the elastic member SP. In this case, the first contact N1 and the second contact N2 can be connected in parallel with each other.
[0092] Because the first contact N1 and the second contact N2 are connected in parallel, the fourth capacitor C14 can be connected to the capacitor section (13 in Figure 12) even if either one of the first contact N1 or the second contact N2 is open. For example, even if the first contact N1 is open, the fourth capacitor C14 can be connected in parallel with the first to third capacitors C11, C12, and C13 via the second contact N2. Conversely, even if the second contact N2 is open, the fourth capacitor C14 can be connected in parallel with the first to third capacitors C11, C12, and C13 via the first contact N1.
[0093] By arranging the first contact N1 and the second contact N2 in parallel, the fourth capacitor C14 can remain connected to the capacitor section 13 even if one of the contacts malfunctions and opens while the aircraft is hovering.
[0094] In the hovering state, the resonant circuit section (12 in Figure 11) of the stylus pen (10 in Figure 1) can resonate based on the capacitance of the capacitor section 13. In this case, the capacitance of the resonant circuit section 12 can be calculated based on the capacitances of the first to fourth capacitors C11, C12, C13, and C14 connected in parallel. The electronic device (20 in Figure 1) can receive the resonant electromagnetic signals E and / or B from the stylus pen 10. Based on the resonant electromagnetic signals E and / or B, the electronic device 20 can receive the input from the stylus pen 10 in the hovering state.
[0095] Figure 20 shows a stylus pen in which the connecting member and the moving member are separated according to one embodiment.
[0096] Referring to Figure 20, the stylus pen in contact (10 in Figure 1) may be in a state where the stylus pen 10 applies pressure to the touchscreen (30 in Figure 1) equivalent to a weight of 1g or more of the weight of the stylus pen 10. The inductor coupling part (141 in Figure 12) can move the movable member 202 in the direction of the first axis Z. The movable member 202 can compress the elastic member 203 in the direction of the first axis Z, separating it from the coupling member 201. This can release the connection between the second signal line (612 in Figure 12) and the third signal line (621 in Figure 12).
[0097] Figure 21 is a circuit diagram of a stylus pen in contact state according to one embodiment.
[0098] Referring to Figures 20 and 21, the elastic member SP can be connected in series with the fourth capacitor C14, and the first contact N1 and the second contact N2 can each be connected in series with the elastic member SP. In this case, the first contact N1 and the second contact N2 can be connected in parallel with each other.
[0099] The first contact N1 and the second contact N2, which are in contact, can both be opened. By opening both the first contact N1 and the second contact N2, the connection between the fourth capacitor C14 and the inductor L2 and capacitors C11, C12, and C13 can be released. Therefore, the first to third capacitors C11, C12, and C13, excluding the fourth capacitor C14, can be connected in parallel.
[0100] The resonant circuit portion (12 in Figure 11) of the stylus pen (10 in Figure 1) in contact can resonate based on the capacitance of the capacitor portion (13 in Figure 11). In this case, the capacitance of the resonant circuit portion 12 can be calculated based on the capacitances of the first to third capacitors C11, C12, and C13 connected in parallel. The electronic device (20 in Figure 1) can receive the resonant electromagnetic signals E and / or B from the stylus pen 10. The electronic device 20 can receive the input from the stylus pen 10 in contact based on the resonant electromagnetic signals E and / or B.
[0101] Although embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto. Various modifications and improvements by those skilled in the art, using the basic concepts of the present invention as defined in the following claims, also fall within the scope of the present invention.
Claims
1. Inductor section; and, A capacitor section comprising: a plurality of first capacitors connected in parallel with the inductor section; a connecting member including a first signal line connected to one end of each of the plurality of first capacitors; a movable member including a second signal line connected to the first signal line when in contact with the connecting member; a conductive elastic member connected to the second signal line; and a capacitor section including a second capacitor connected between the elastic member and the other end of each of the plurality of first capacitors. and The connecting member and the moving member can contact each other in different first and second contact regions. The first contact region and the second contact region are provided in parallel with each other in order to connect the second capacitor in parallel with the plurality of first capacitors. A stylus pen characterized in that, when the connecting member and the movable member are in contact with at least one of the first contact region and the second contact region, the second capacitor is electrically connected to the inductor portion via the elastic member, the movable member and the connecting member.
2. The inductor section is Ferrite core; and, The stylus pen according to claim 1, characterized in that it includes a coil wound around the outer surface of the ferrite core, with one end connected to one end of each of the plurality of first capacitors and the other end connected to the other end of each of the plurality of first capacitors.
3. The ferrite core further includes a core body that penetrates the ferrite core, The stylus pen according to claim 2, characterized in that the pressure transmitted to one side of the core is transmitted to the moving member.
4. The stylus pen according to claim 3, characterized in that if the pressure exceeds a first reference value, the elastic member is compressed by the moving member.
5. The stylus pen according to claim 4, characterized in that when the elastic member is compressed, the movable member and the connecting member separate, and both the electrical connection between the first signal line and the second signal line in the first contact region and the electrical connection between the first signal line and the second signal line in the second contact region are released.
6. The stylus pen according to claim 3, further comprising an inductor moving part connected to the other side of the core body, passing through the connecting member and contacting the moving member, and transmitting the pressure to the moving member.
7. The first signal line includes a first contact region corresponding to the first contact region and a second contact region corresponding to the second contact region, The second signal line includes a first conductive region corresponding to the first contact region and a second conductive region corresponding to the second contact region. The stylus pen according to claim 1, characterized in that when the moving member comes into contact with the connecting member, the first contact area and the first conductive area are electrically connected to each other at the first contact area, or the second contact area and the second conductive area are electrically connected to each other at the second contact area.
8. The stylus pen according to claim 1, characterized in that the elastic member includes a spring made of a metal material.
9. The stylus pen according to claim 1, wherein the capacitor portion further includes a movement limiting member that limits the movement of the movable member.
10. The stylus pen according to claim 9, characterized in that the movement-restricting member includes a first movement-restricting member and a second movement-restricting member positioned in contact with the first movement-restricting member at its upper end.
11. The inductor section includes the inductor connection section, A capacitor portion includes a movable member that is moved by the inductor connecting portion, an elastic member connected to the movable member at the upper end of the movable member, and a connecting member that can contact the movable member, A stylus pen comprising a capacitor section comprising a plurality of first capacitors connected in parallel with the inductor section and electrically connected to the connecting member, and a second capacitor that can be connected in parallel with the plurality of first capacitors and electrically connected to the elastic member; and A touchscreen including a touch electrode layer that receives an electromagnetic signal resonated by the stylus pen; Includes, The connecting member and the moving member can contact each other in different first and second contact regions. The first contact region and the second contact region are provided in parallel with each other in order to connect the second capacitor in parallel with the plurality of first capacitors. A touch system characterized in that, when the connecting member and the movable member are in contact with at least one of the first contact region and the second contact region, the second capacitor is electrically connected to the inductor portion via the elastic member, the movable member and the connecting member.
12. The touch system according to claim 11, characterized in that the connecting member is formed in contact with the moving member at the upper end of the moving member.
13. The touch system according to claim 12, characterized in that the connecting member and the moving member make contact in the first contact area and the second contact area based on the pressure of the stylus pen, and the first contact area and the second contact area are plated with a conductive material.
14. The touch system according to claim 13, characterized in that when the pressure applied by the stylus pen exceeds a first reference value, the connecting member and the moving member are separated, and the electrical connection in both the first contact area and the second contact area is released.
15. The touch system according to claim 13, characterized in that if the pressure of the stylus pen is less than or equal to a first reference value, the connecting member and the moving member come into contact in the first contact area and / or the second contact area, and the plurality of capacitors included in the capacitor section are electrically connected to the inductor section.
16. Inductor section; A capacitor region including a plurality of first capacitors connected in parallel with the inductor portion, and a second capacitor that can be connected in parallel with the plurality of first capacitors; An elastic member located at the lower end of the capacitor region and electrically connected to the second capacitor; A movable member located at the lower end of the elastic member and connected to the elastic member; A connecting member formed while enclosing the capacitor region, the elastic member, and the outer casing of the movable member, and configured to be electrically connectable to the plurality of first capacitors and the inductor portion; and A first contact region and a second contact region, which are different from each other, where the moving member and the connecting member come into contact; Includes, The first contact region and the second contact region are provided in parallel with each other in order to connect the second capacitor in parallel with the plurality of first capacitors. A stylus pen characterized in that, when the connecting member and the movable member are in contact with at least one of the first contact region and the second contact region, the second capacitor is electrically connected to the inductor portion via the elastic member, the movable member and the connecting member.
17. The stylus pen according to claim 16, characterized in that the elastic member includes a spring made of a metal material.
18. The aforementioned connecting member is The stylus pen according to claim 17, characterized in that it includes a conductive region connected to the capacitor region and plated with a conductive material.
19. The stylus pen according to claim 18, characterized in that the charge accumulated in the capacitor region is transmitted to at least one of the first contact region and the second contact region via the conductive region.