Stylus pen

Abstract

To provide a stylus pen for effectively receiving and transmitting magnetic signals that are received from and transmitted to an electronic device.SOLUTION: A stylus pen according to one embodiment may include: an inductor unit; and a capacitor unit including a plurality of first capacitors connected in parallel with the inductor unit, a connecting member including a first signal line connected to one end of each of the plurality of first capacitors, a moving member including a second signal line connected to the first signal line when contacting 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.SELECTED DRAWING: Figure 12

Description

[Technical Field]

[0001] The present disclosure relates to a stylus pen. [Background technology]

[0002] 2. Description of the Related Art Touch sensors are installed in various devices such as mobile phones, smartphones, tablet PCs, laptop computers, digital broadcasting terminals, PDAs (Personal Digital Assistants), PMPs (Portable Multimedia Players), and navigation systems.

[0003] The touch sensor in such a device may be located on a display panel that displays an image or on a region of the device body. A user can interact with the device by touching the touch sensor, allowing the device to provide the user with an intuitive user interface.

[0004] A user can use a stylus pen for precise touch input, which can send and receive signals to and from a touch sensor via electrical and / or magnetic methods. Summary of the Invention [Problem to be solved by the invention]

[0005] One embodiment provides a stylus pen for effectively receiving and transmitting magnetic signals from and to an electronic device. [Means for solving the problem]

[0006] A stylus pen according to one embodiment for solving such technical problems includes an inductor unit, a plurality of first capacitors connected in parallel to the inductor unit, a connecting member including a first signal line connected to one end of each of the plurality of first capacitors, a moving member including a second signal line connected to the first signal line when contacting the connecting member, a conductive elastic member connected to the second signal line, and a capacitor unit including a second capacitor connected between the elastic member and the other end of each of the plurality of first capacitors.

[0007] According to one embodiment, the touch system may include a stylus pen including an inductor unit including an inductor connector, a moving member moved by the inductor connector, a capacitor unit including an elastic member connected to the moving member at an upper end of the moving member, and a touch screen including a touch electrode layer that receives an electromagnetic signal resonated by the stylus pen.

[0008] A stylus pen according to one embodiment may include a capacitor region including a plurality of capacitors, an elastic member located at a lower end of the capacitor region and in contact with the capacitor region, a movable member located at a lower end of the elastic member and connected between the elastic member and an inductor portion, a connecting member formed to surround the capacitor region, the elastic member, and the outer periphery of the movable member, and a contact region where the movable member and the connecting member come into contact. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a conceptual diagram illustrating a stylus pen and an electronic device. [Figure 2] 1A and 1B are diagrams illustrating a signal transmission operation between a stylus pen and an electronic device. [Figure 3] 1A and 1B are diagrams illustrating a signal transmission operation between a stylus pen and an electronic device. [Figure 4] 1A and 1B are diagrams illustrating a signal transmission operation between a stylus pen and an electronic device. [Figure 5]FIG. 10 is a diagram showing a stylus pen according to a comparative example. [Figure 6] 10A and 10B are diagrams showing elements included in the housing of a stylus pen according to a comparative example; [Figure 7] 10A and 10B are diagrams illustrating a contact state between a connecting member and a moving member in a hovering state. [Figure 8] FIG. 10 is a circuit diagram of a stylus pen according to a comparative example. [Figure 9] 10A and 10B are diagrams illustrating a contact state between a connecting member and a moving member in a hovering state. [Figure 10] FIG. 10 is a circuit diagram of a stylus pen according to a comparative example. [Figure 11] FIG. 1 illustrates a stylus pen according to one embodiment. [Figure 12] FIG. 1 illustrates a stylus pen according to one embodiment. [Figure 13] 3A and 3B are diagrams illustrating a pressure sensing portion and a connecting portion of a stylus pen. [Figure 14] FIG. [Figure 15] FIG. [Figure 16] 10A and 10B are diagrams illustrating a stylus pen in which a connecting member and a moving member are in contact with each other according to an embodiment. [Figure 17] FIG. 2 is a circuit diagram of a stylus pen in a hovering state according to an embodiment. [Figure 18] 10A and 10B are diagrams illustrating a stylus pen in which a connecting member and a moving member are in contact with each other according to an embodiment. [Figure 19] FIG. 2 is a circuit diagram of a stylus pen in a hovering state according to an embodiment. [Figure 20] 10A and 10B are diagrams illustrating a stylus pen in which a connecting member and a moving member are separated from each other according to an embodiment; [Figure 21] FIG. 2 is a circuit diagram of a stylus pen in a contact state according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE INVENTION The present invention may be embodied in various different forms and is not limited to the embodiments set forth herein.

[0011] In order to clearly describe the present invention, parts that are not relevant to the description will be omitted, and the same reference numerals will be used throughout the specification to refer to the same or similar components.

[0012] Furthermore, throughout the specification, when a part is said to "comprise" a certain element, this does not mean that it excludes other elements, but that it may further include other elements, unless otherwise specified to the contrary.

[0013] FIG. 1 is a conceptual diagram showing a stylus pen and an electronic device.

[0014] Referring to FIG. 1, a stylus pen 10 is located near a touchscreen 30 of an electronic device 20 and can receive signals output from the electronic device 20 or the touchscreen 30 and transmit signals to the touchscreen 30 .

[0015] 2 to 4 are diagrams that schematically show signal transmission operations between a stylus pen (10 in FIG. 1) and an electronic device (20 in FIG. 1).

[0016] 2, the touch screen 30a may include a digitizer 31, a display panel 32, a touch electrode layer 33, and a window 34. In an EMR (Electro-Magnetic Resonance) type passive stylus pen, when the digitizer 31 transmits a magnetic signal B to the EMR type stylus pen 10, a resonant circuit included in the stylus pen 10 can resonate based on the magnetic signal B. Then, the digitizer 31 can receive the resonated magnetic signal B from the stylus pen 10.

[0017] The digitizer 31 can be attached under the display panel 32 and can include an FPCB (Flexible Printed Circuit Board) on which multiple conductive antenna loops are formed, and a ferrite sheet that blocks the magnetic field generated by the antenna loops and blocks eddy currents that may be generated in other electrical elements and components when the antenna loops form a magnetic field.

[0018] The FPCB may have multiple antenna loops arranged in multiple layers to detect the position where the resonant signal is input. One antenna loop may overlap at least one other antenna loop in the Z-axis direction. This increases the thickness of the FPCB, making it difficult to make the electronic device 20 thinner and more compact.

[0019] If such a digitizer 31 is mounted on a foldable / flexible electronic device 20, deformation may occur in the FPCB attached to the folded area when the device is folded. Repeated folding may apply stress to the wiring member forming the antenna loop, ultimately resulting in damage to the wiring member. 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, so it is prone to deformation when the electronic device 20 is folded, and may be damaged by repeated folding.

[0020] Referring to FIG. 3, the touch screen 30b may include a display panel 32, a touch electrode layer 33, and a window .

[0021] If the electrodes of the touch electrode layer 33 transmit a magnetic signal B to the stylus pen 10, a 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 the resonated electromagnetic signals E and / or B from the stylus pen 10. If the electrodes of the touch electrode layer 33 are formed of 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 an additional unit or module to transmit magnetic signals to the stylus pen 10, so the touchscreen 30b can be made thinner, which may be advantageous in terms of manufacturing costs.

[0023] 4, the touch screen 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, a resonant circuit included in the stylus pen 10 may resonate based on the magnetic signal B. Then, the electrodes of the touch electrode layer 33 may receive the resonated 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, which simplifies the wiring structure and allows the touch screen 30c to be made thinner. This can be advantageous for making the electronic device 20 thinner and more compact. In addition, since the loop coil 35 can be formed in various sizes and at various positions, such a touch screen 30c can also be applied to a foldable / flexible electronic device 20.

[0025] The loop coil 35 may include a substrate on which the antenna loop is located and a ferrite sheet. The antenna loop may be formed of a conductive material such as copper or silver. The antenna loop may be located on the same layer as the touch electrode layer 33 other than the substrate. In this case, the antenna loop may be formed of a conductive material exhibiting high transmittance and low impedance, such as metal mesh, ITO, graphene, or silver nanowire. The antenna loop may also be located under a 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. Although the touch electrode layer 33 is illustrated as a single layer in Fig. 4, the first touch electrodes and the second touch electrodes may be located on different layers, may be located overlapping each other, or may not be located overlapping each other, and another layer may be interposed between the first touch electrodes and the second touch electrodes, and are not limited thereto.

[0027] FIG. 5 is a diagram showing a stylus pen according to a comparative example.

[0028] Referring to FIG. 5, the stylus pen 10 may include a resonant circuit unit 12 within a housing 11. The resonant circuit unit 12 is an LC resonant circuit that resonates with a drive signal output from the touch screen (30 in FIG. 1). The drive signal may include a signal (e.g., a sine wave, a square wave, etc.) having a frequency corresponding to the resonant frequency of the resonant circuit unit 12. For example, the resonant circuit unit 12 may resonate based on a magnetic signal B received from a digitizer (31 in FIG. 2), a touch electrode layer (33 in FIG. 3), or a loop coil (35 in FIG. 4). For resonance to occur, the resonant frequency of the resonant circuit unit 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 depends on the design value of the resonant circuit unit 12.

[0029] The elements included in the stylus pen 10 may be received in a housing 11. The housing 11 may have, but is not limited to, a cylindrical, polygonal, partially curved, entasis, frustum of pyramid, or circular truncated cone shape. The housing 11 has an open interior, so that elements of the stylus pen 10, such as the resonant circuit unit 12, can be received therein. The housing 11 may be made of a non-conductive material.

[0030] The resonant circuit unit 12 may include an inductor unit 14 and a capacitor unit 13. The inductor unit 14 may include a ferrite core 15 through which a core 17 passes and a coil 16 wound around the outer surface of the ferrite core 15. The ferrite core 15 may be, for example, a cylindrical ferrite material, with a through-hole of a predetermined diameter (e.g., 1 mm) formed in the axial direction to allow the core 17 to be inserted and passed through. The coil 16 may be wound over the entire axial length of the ferrite core 15, or over a portion of the axial length. The coil 16 may be electrically connected to the capacitor unit 13.

[0031] The capacitor unit 13 may include a plurality of capacitors connected in parallel. The plurality of capacitors may have different capacitances. The capacitor unit 13 may change its structure based on the writing pressure applied by the stylus pen 10 to the touch screen 30. For example, the capacitor unit 13 may determine the connection state of each of the plurality of capacitors based on the writing pressure.

[0032] One end of the core 17 can protrude from the ferrite core 15 as a pen tip. The core 17 can be made of a conductor, for example, an electrode core made of a hard resin mixed with a conductive metal or conductive powder.

[0033] FIG. 6 is a diagram showing elements contained within the housing of a stylus pen according to a comparative example.

[0034] 6, the stylus pen 10 may include a capacitor unit 13 and an inductor unit 14. The capacitor unit 13 may include a plurality of capacitors 131a, 131b, 131c, and 131d and a pressure sensing unit 132. The capacitance of the capacitor unit 13 may be calculated by adding up the capacitances of the plurality of capacitors 131a, 131b, 131c, and 131d. The number of capacitors 131a, 131b, 131c, and 131d used to calculate the capacitance of the capacitor unit 13 may be determined based on the movement of the pressure sensing unit 132. As a result, the capacitance of the capacitor unit 13 may change based on the movement of the pressure sensing unit 132, and the resonant frequency of the resonant circuit unit 12 may be changed according to the changed capacitance.

[0035] The plurality of capacitors 131a, 131b, 131c, and 131d may be located at an upper end of the capacitor unit 13 in the first axis Z direction. First capacitors 131a, 131b, 131c, and 131d among the plurality of capacitors 131a, 131b, 131c, and 131d may be connected in parallel to each other between a first contact M1 connected to one end of the inductor unit 14 and a second contact M2 connected to the other end of the inductor unit 14. One end of a second capacitor 131d among the plurality of capacitors 131a, 131b, 131c, and 131d may be connected to the pen pressure sensing unit 132, and the other end of the second capacitor 131d may be connected to the contact M2 to which the other end of the inductor unit 14 is connected.

[0036] The pressure sensing unit 132 can disconnect the first capacitors 131a, 131b, and 131c and the second capacitor 131d connected in parallel based on the pressure applied by the stylus pen 10 to the touch screen (30 in FIG. 1). The pressure applied by the touch screen (30 in FIG. 1) to the core body 17 can move the pressure sensing unit 132, which is in contact with the core body 17 in the first axis Z direction. When the pressure sensing unit 132 moves, the second capacitor 131d can be disconnected from the first capacitors 131a, 131b, and 131c. The pressure sensing unit 132 can include a connecting member 61, an inductor connecting member 141, a moving member 62, and movement limiting members 63 and 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 may connect the first contact M1 to one end of the inductor unit 14 and the fourth contact M4 to the other end of the inductor unit 14. The second signal line 612 may 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 may be connected to the first contact M1 via the fourth signal line 631, and the fourth contact M4 may be connected to the second contact M2 via the fifth signal line 632. The first capacitors 131a, 131b, and 131c may be connected in parallel between the first contact M1 and the fourth contact M4. The second capacitor 131d may be disposed on the fifth signal line 632 and connected in series between the second contact M2 and the fourth contact M4.

[0038] The connecting member 61 may include a cavity therein. The inductor connecting portion 141 can move in the first axis Z direction via the cavity.

[0039] The inductor connector 141 can move the moving member 62 in the direction of the first axis Z. When the stylus pen 10 applies pressure to the touch screen 30, the pressure transmitted to the core 17 is transmitted to the moving member 62 via the inductor connector 141, and the moving member 62 can move in the direction of the first axis Z. The inductor connector 141 can pass through the connecting member 61 and be connected to the moving member 62. One end of the inductor connector 141 can be connected to the core 17. The other end of the inductor connector 141 can pass through the connecting member 61 and be physically connected to the moving member 62.

[0040] The moving member 62 may include a third signal line 621. When the moving member 62 and the connecting member 61 are in contact with each other, the third signal line 621 may be electrically connected to the second signal line 612 and the first signal line 611. In this case, the third signal line 621 may be electrically connected to the second signal line 612 at the first contact area 65 and the second contact area 66. When the moving member 62 and the connecting member 61 are in contact with each other, one end of the second capacitor 131d may be connected to one end of the inductor unit 14 via the third connection point M3, the fourth signal line 631, and the first contact point M1.

[0041] The position of the moving member 62 can be changed based on the writing pressure of the stylus pen 10. The moving member 62 can come into contact with the connecting member 61 in the first axis Z direction of the connecting member 61. When the stylus pen 10 applies pressure to the touch screen 30, the core 17 can move the moving member 62 in the first axis Z direction via the inductor connecting part 141. At that time, the moving member 62 moved in the first axis Z direction can be separated from the connecting member 61.

[0042] When the moving member 62 and the connecting member 61 are spaced apart, the electrical connection between the third signal line 621 and the first and second signal lines 611 and 612 can be released. When the moving member 62 and the connecting member 61 are spaced apart, one end of the second capacitor 131d can be disconnected from the inductor unit 14.

[0043] The first movement limiting member 63 and the second movement limiting member 64 can limit the movement of the movable member 62 in the first axis Z direction. When the stylus pen 10 applies pressure to the touch screen 30, the movable member 62 can move in the first axis Z direction. At that time, the first movement limiting member 63 and the second movement limiting member 64 can protect the plurality of capacitors 131a to 131d from the movement of the movable member 62 in the first axis Z direction.

[0044] The first movement limiting member 63 can come into contact with the moving member 62 in the direction of the first axis Z of the moving member 62. The second movement limiting member 64 can come into contact with the first movement limiting member 63 in the direction of the first axis Z of the first movement limiting member 63.

[0045] When the stylus pen 10 applies pressure to the touch screen 30, the second movement limiting member 64 and the first movement limiting member 63 can come into close contact with each other. In this case, the second movement limiting member 64 can be formed in a hemispherical shape to eliminate the impact applied from the first movement limiting member 63 to the second movement limiting member 64. In this case, the shape of the second movement limiting 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 limiting member 63 can be formed in a rectangular parallelepiped shape. By forming the first movement limiting member 63 in a rectangular parallelepiped shape, the pressure that the first movement limiting member 63 applies to the second movement limiting member 64 can be dispersed.

[0047] The inductor unit 14 may include a ferrite core 15 through which a core 17 passes and a coil 16 wound on the outer surface of the ferrite core 15. The coil 16 wound on the outer surface of the ferrite core 15 may be connected to one end and the other end of the first capacitors 131a, 131b, and 131c. In addition, the coil 16 wound on the outer surface of the ferrite core 15 may be connected to the other end of the second capacitor 131d.

[0048] FIG. 7 is a diagram showing a contact state between the connecting member and the moving member in a hovering state.

[0049] Prior to the description of Figure 7, the hovering state may refer to a state in which the stylus pen (10 in Figure 1) is not in contact with the touch screen (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 unit (12 in Figure 5) of the stylus pen 10 can receive magnetic signals from the electronic device (20 in Figure 1).

[0050] The hovering state may refer to a state in which the stylus pen 10 is in contact with the touch screen 30, but a weight of less than about +1 g of the stylus pen weight applies pressure to the touch screen 30. Conversely, the contact state may refer to a state in which a pressure corresponding to a weight of more than about +1 g of the stylus pen weight is applied to the touch screen 30.

[0051] The stylus pen 10 in the hovering state can perform different functions from the stylus pen 10 in the contact state. The stylus pen 10 in the hovering state can adjust the cursor position or perform specific functions without physical contact with the touch screen 30. For example, in the hovering state, a cursor or pointer is displayed on the screen to visually confirm the position of the pen. In some software, preview information for tools or menus can also be displayed. In addition, in the hovering state, functions different from those in the contact state, such as switching screens via specific gestures such as swiping, can be provided.

[0052] 7, the stylus pen 10 in the hovering state may not be in contact with the touch screen (30 in FIG. 1). As a result, the connecting member 61 contacts the moving member 62, and the second signal line (612 in FIG. 6) and the third signal line (621 in FIG. 6) may 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 may all be connected to the inductor unit 14. However, one end of the fourth capacitor C4 may be connected to the connecting member 61, and the other end of the fourth capacitor C4 may be connected to the inductor unit 14.

[0053] FIG. 8 is a circuit diagram of a stylus pen according to a comparative example in a hovering state.

[0054] 7 and 8, the first contact N1 and the second contact N2 may be electrically connected to each other. Thus, the fourth capacitor C4 may be connected in parallel to the first to third capacitors C1 to C3. The fourth capacitor C4 may be connected in parallel to the capacitor unit 13 (13 in FIG. 5), thereby changing the capacitance of the capacitor unit 13.

[0055] The resonant circuit unit (12 in FIG. 5) of the stylus pen (10 in FIG. 1) in the hovering state can resonate based on the changed capacitance of the capacitor unit 13. In this case, the capacitance of the resonant circuit unit 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 FIG. 1) can receive the resonated electromagnetic signals E and / or B from the stylus pen 10. The electronic device 20 can receive the input of the stylus pen 10 in the hovering state based on the resonated electromagnetic signals E and / or B.

[0056] FIG. 9 is a diagram showing a contact state between the connecting member and the moving member in a hovering state.

[0057] 9, the stylus pen (10 in FIG. 1) in a hovering state may not be in contact with the touch screen (30 in FIG. 1). However, the connecting member 61 may be in contact with the moving member 62 through the second contact area 66, but not through the first contact area 65. The connecting member 61 and the moving member 62 may be spaced apart from each other based on the first contact area 65. In one embodiment, the connecting member 61 and the moving member 62 may not be in contact with the second contact area 66 in a hovering state, but may be in contact with the first contact area 65. However, for convenience of explanation, the following description will be given assuming that the connecting member 61 is in contact with the moving member 62 only through the second contact area 66.

[0058] Due to mass production deviations of the connecting member 61 and the moving member 62 and the infiltration of foreign matter, the connecting member 61 and the moving member 62 in the hovering state can only contact at the second contact area 66 among the first contact area 65 and the second contact area 66. This allows the connection between the second signal line (612 in FIG. 6) and the third signal line (621 in FIG. 6) at the first contact area 65 to be released.

[0059] FIG. 10 is a circuit diagram of a stylus pen according to a comparative example in a hovering state.

[0060] 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. Because the fourth capacitor C4 is disconnected from the capacitor unit (13 in FIG. 5), the capacitance of the capacitor unit 13 in FIG. 10 may be different from the capacitance of the capacitor unit 13 in FIG. 8.

[0061] The resonant circuit unit (12 in FIG. 5) of the stylus pen (10 in FIG. 1) may resonate based on the capacitance of the capacitor unit 13. In this case, the capacitance of the resonant circuit unit 12 may be calculated based on the capacitance of the first to third capacitors C1 to C3 connected in parallel. The stylus pen 10 may transmit the resonated electromagnetic signals E and / or B in the contact state to the electronic device (20 in FIG. 1) even in the hovering state. This may cause a malfunction in which the electronic device 20 receives an input from the stylus pen 10 in the contact state.

[0062] FIG. 11 is a diagram illustrating a stylus pen according to one embodiment.

[0063] 11, the stylus pen 10 may include the same components as the stylus pen 10 of FIG. 5. However, unlike the stylus pen 10 of FIG. 5, the capacitor unit 13 of the stylus pen 10 may include a connection unit 133.

[0064] The connecting unit 133 can connect the capacitor unit 13 and the inductor unit 14. The connecting unit 133 can include an elastic member that is elastic and conductive. As an example, the elastic member can include a spring made of a metal material such as stainless steel. The elastic member can be disposed between any one of the plurality of capacitors (131a to 131d in FIG. 6) included in the capacitor unit 13 and the connecting member (61 in FIG. 6).

[0065] FIG. 12 is a diagram illustrating a stylus pen according to one embodiment.

[0066] The stylus pen 10 in Fig. 12 may include the same configuration as the stylus pen (10 in Fig. 6). However, the stylus pen 10 may additionally include an elastic member 121 compared to the stylus pen (10 in Fig. 6). The stylus pen 10 will be described, focusing on the elastic member 121.

[0067] The elastic member 121 may be connected to the fifth signal line 632 via a fourth contact N4. The second capacitor 131d may be disposed on the fifth signal line 632, and the elastic member 121 may be electrically connected to one end of the second capacitor 131d. The other end of the second capacitor 131d may be connected to the inductor unit 14 via a second contact N2.

[0068] The elastic member 121 may be disposed between the fourth contact N4 and the moving member 62 and may be in contact with the moving member 62. The elastic member 121 may be electrically connected to the third signal line 621 included in the moving member 62. As a result, one end of the second capacitor 131d may be electrically connected to the inductor unit 14.

[0069] The third signal line 621 can be electrically connected to the second signal line 612 via the first contact area 65 and the second contact area 66. In this case, even if the third signal line 621 is connected to the second signal line 612 at only one of the first contact area 65 and the second contact area 66, one end of the second capacitor 131d can be electrically connected to the inductor unit 14.

[0070] The moving member 62 can compress the elastic member 121 in the direction of the first axis Z, and the moving 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 elastic member 121 can control the movement distance of the moving member 62 by adjusting the strength of the metal material, and in this case, the strength of the metal material and the movement distance of the moving member 62 can be inversely proportional to each other.

[0071] When the stylus pen 10 applies pressure to the touch screen (30 in FIG. 1), the pressure transmitted to the core body 17 is transmitted to the moving member 62 via the inductor connecting portion 141, and the moving member 62 can compress the elastic member 121 in the first axis Z direction. At this time, the moving member 62 is separated from the connecting member 61, and the electrical connection between the third signal line 621 and the first and second signal lines 611 and 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] FIG. 13 is a diagram showing the pressure sensing portion and the connecting portion of the stylus pen.

[0073] 13, the writing pressure sensing unit (132 in FIG. 12) may include a connecting member 61 and a moving member 62. The connecting unit (133 in FIG. 11) may include an elastic member 121. The connecting member 61 and the moving member 62 may contact each other at a first contact area 65. For convenience of explanation, the second contact area (66 in FIG. 12) is omitted.

[0074] The connecting member 61 may be formed to surround the outer periphery of the capacitor region 134, the elastic member 121, and the moving member 62 along the first axis Z direction. The elastic member 121 may be disposed between the capacitor region 134 and the moving member 62. The capacitor region 134 may be connected to an upper end of the elastic member 121 along the first axis Z direction. The moving member 62 may be connected to a lower end of the elastic member 121 along the first axis Z direction.

[0075] When the stylus pen 10 applies pressure to the touch screen (30 in FIG. 1), the moving member 62 can move in the direction of the first axis Z. The moving member 62 can compress the elastic member 121 in the direction of the first axis Z. In addition, the moving member 62 does not contact the connecting member 61 at the first contact area 65, and can be spaced apart from each other.

[0076] FIG. 14 is a diagram showing a connecting member.

[0077] 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, and non-metals such as graphite.

[0078] The contact region 662 may include a region where the connecting member 61 contacts the moving member (62 in FIG. 13). The contact region 662 may also be coated or plated with a conductive material. When the connecting member 61 contacts the moving member 62, a current may flow to the contact region 662 via the conductive region 661. For example, charges accumulated in the capacitor unit (13 in FIG. 13) may be transferred from the conductive region 661 to the contact region 662 via the second signal line (612 in FIG. 12). Alternatively, charges may be transferred from the contact region 662 to the capacitor unit (13 in FIG. 13) via the conductive region 661 and the second signal line 612.

[0079] FIG. 15 is a diagram showing a moving member.

[0080] 15, the moving member 62 may include a conductive region 671. The conductive region 671 may refer to a region coated or plated with a conductive material. The conductor may include metals such as copper, aluminum, and silver, and non-metals such as graphite.

[0081] The conductive region 671 may include a region where the moving member 62 contacts the connecting member (61 in FIG. 14). When the moving member 62 contacts the connecting member 61, a current may flow through the conductive region 671. For example, charges accumulated in the capacitor unit (13 in FIG. 13) may be transferred to the conductive region 671 via the second signal line (612 in FIG. 12) and the third signal line (621 in FIG. 12). Alternatively, charges may be transferred from the conductive region 671 to the capacitor unit 13 via the second signal line 612 and the third signal line 621.

[0082] FIG. 16 is a diagram showing a stylus pen in which a connecting member and a moving member are in contact with each other according to an embodiment.

[0083] 16, the stylus pen (10 in FIG. 1) in the hovering state may be in a state where no pressure is applied to the touch screen (30 in FIG. 1), so that the connecting member 161 and the moving member 162 can contact each other 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 may all be connected to the inductor unit 166. However, one end of the fourth capacitor C14 may be connected to the elastic member 163, and the other end of the fourth capacitor C14 may be connected to the inductor unit 166. Because the connecting member 161 and the moving member 162 are in contact with each other, the second signal line (612 in FIG. 12) and the third signal line (621 in FIG. 12) may be electrically connected to each other.

[0085] FIG. 17 is a circuit diagram of a stylus pen in a hovering state according to one embodiment.

[0086] 16 and 17, the elastic member SP is connected in series to the fourth capacitor C14, and the first contact N1 and the second contact N2 are connected in series with the elastic member SP. At this time, the first contact N1 and the second contact N2 are connected in parallel with each other. Because the first contact N1 and the second contact N2 are not open, the fourth capacitor C14 is connected in parallel with the first to third capacitors C11, C12, and C13 via the first contact N1 or the second contact N2.

[0087] The resonant circuit unit (12 in FIG. 11) of the stylus pen (10 in FIG. 1) in the hovering state may resonate based on the capacitance of the capacitor unit (13 in FIG. 11). In this case, the capacitance of the resonant circuit unit 12 may be calculated based on the capacitance of the first to fourth capacitors C1 to C4 connected in parallel. The electronic device (20 in FIG. 1) may receive the resonated electromagnetic signals E and / or B from the stylus pen (10 in FIG. 1). The electronic device 20 may receive an input from the stylus pen 10 in the hovering state based on the resonated electromagnetic signals E and / or B.

[0088] FIG. 18 is a diagram showing a stylus pen in which a connecting member and a moving member are in contact with each other according to an embodiment.

[0089] 18, the stylus pen (10 in FIG. 1) in the hovering state may not apply any pressure to the touch screen (30 in FIG. 1). However, due to mass production deviations and infiltration of foreign matter in the connecting member 181 and the moving member 182, the connecting member 181 and the moving member 182 in the hovering state may only contact the second contact region 185 out of the first contact region 184 and the second contact region 185.

[0090] FIG. 19 is a circuit diagram of a stylus pen in a hovering state according to one embodiment.

[0091] 18 and 19, the elastic member SP may be connected in series to the fourth capacitor C14, and the first contact N1 and the second contact N2 may be connected in series with the elastic member SP, and the first contact N1 and the second contact N2 may 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 unit (13 in FIG. 12) even if one of the first contact N1 and the second contact N2 is opened. For example, even if the first contact N1 is opened, the fourth capacitor C14 can be connected in parallel to the first to third capacitors C11, C12, and C13 via the second contact N2. Conversely, even if the second contact N2 is opened, the fourth capacitor C14 can be connected in parallel to 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 be connected to the capacitor unit 13 even if one of the contacts is opened due to a defect during hovering.

[0094] The resonant circuit unit (12 in FIG. 11) of the stylus pen (10 in FIG. 1) in the hovering state may resonate based on the capacitance of the capacitor unit 13. In this case, the capacitance of the resonant circuit unit 12 may be calculated based on the capacitances of first to fourth capacitors C11, C12, C13, and C14 connected in parallel. The electronic device (20 in FIG. 1) may receive the resonated electromagnetic signals E and / or B from the stylus pen 10. The electronic device 20 may receive an input from the stylus pen 10 in the hovering state based on the resonated electromagnetic signals E and / or B.

[0095] FIG. 20 is a diagram showing a stylus pen in which a connecting member and a moving member are separated from each other according to an embodiment.

[0096] 20, the stylus pen (10 in FIG. 1) in contact state may be a state in which the stylus pen 10 applies pressure to the touch screen (30 in FIG. 1) equivalent to a weight of at least 1 g greater than the weight of the stylus pen 10. The inductor connector (141 in FIG. 12) can move the moving member 202 in the direction of the first axis Z. The moving member 202 can compress the elastic member 203 in the direction of the first axis Z and separate from the connecting member 201. As a result, the connection between the second signal line (612 in FIG. 12) and the third signal line (621 in FIG. 12) can be released.

[0097] FIG. 21 is a circuit diagram of a stylus pen in a contact state according to one embodiment.

[0098] 20 and 21, the elastic member SP may be connected in series to the fourth capacitor C14, and the first contact N1 and the second contact N2 may be connected in series with the elastic member SP, and the first contact N1 and the second contact N2 may be connected in parallel with each other.

[0099] The first contact N1 and the second contact N2 in the contact state can be both opened. By opening the first contact N1 and the second contact N2, the connection between the fourth capacitor C14 and the inductor L2 and the capacitors C11, C12, and C13 can be broken. Therefore, the first to third capacitors C11, C12, and C13, excluding the fourth capacitor C14, can be connected in parallel.

[0100] The resonant circuit unit (12 in FIG. 11) of the stylus pen (10 in FIG. 1) in a contact state may resonate based on the capacitance of the capacitor unit (13 in FIG. 11). In this case, the capacitance of the resonant circuit unit 12 may be calculated based on the capacitances of first to third capacitors C11, C12, and C13 connected in parallel. The electronic device (20 in FIG. 1) may receive the resonated electromagnetic signals E and / or B from the stylus pen 10. The electronic device 20 may receive the input of the stylus pen 10 in a contact state based on the resonated electromagnetic signals E and / or B.

[0101] Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

Claims

1. an inductor portion; and a capacitor unit including: a plurality of first capacitors connected in parallel with the inductor unit; a connecting member including a first signal line connected to one end of each of the plurality of first capacitors; a moving member including a second signal line connected to the first signal line when contacting 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; A stylus pen comprising:

2. The inductor section ferrite core; and 2. The stylus pen of claim 1, further comprising a coil wound around the outer surface of the ferrite core, one end of which is connected to one end of each of the plurality of first capacitors and the other end of which is connected to the other end of each of the plurality of first capacitors.

3. Further comprising a core body penetrating the ferrite core, The stylus pen according to claim 2 , wherein the pressure transmitted to one side of the core body is transmitted to the moving member.

4. The stylus pen according to claim 3 , wherein the elastic member is compressed by the moving member when the pressure exceeds a first reference value.

5. The stylus pen of claim 4, wherein when the elastic member is compressed, the moving member and the connecting member are separated from each other, thereby releasing the electrical connection between the first signal line and the second signal line.

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, to transmit the pressure to the moving member.

7. the connecting member includes a contact area as the first signal line; the moving member includes a conductive region as the second signal line, The stylus pen according to claim 1 , wherein the contact area and the conductive area are electrically connected to each other when the moving member contacts the connecting member.

8. 2. The stylus pen according to claim 1, wherein the elastic member includes a spring made of a metal material.

9. The stylus pen of claim 1 , wherein the capacitor unit further comprises a movement limiting member for limiting the movement of the moving member.

10. The stylus pen of claim 9 , wherein the movement limiting member includes a first movement limiting member and a second movement limiting member disposed at an upper end of the first movement limiting member in contact with the first movement limiting member.

11. a stylus pen including an inductor unit including an inductor connector, a moving member moved by the inductor connector, and a capacitor unit including an elastic member connected to the moving member at an upper end of the moving member; and a touch screen including a touch electrode layer for receiving an electromagnetic signal resonated by the stylus pen; A touch system comprising:

12. The touch system of claim 11, wherein the stylus pen further comprises a connecting member connecting the inductor unit and the capacitor unit, the connecting member being formed at an upper end of the moving member in contact with the moving member.

13. 13. The touch system of claim 12, wherein the connecting member and the moving member contact each other at a first contact area and a second contact area different from the first contact area based on the writing 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 of claim 13 , wherein the connecting member and the moving member are separated from each other when the writing pressure of the stylus pen exceeds a first reference value.

15. 14. The touch system of claim 13, wherein when the writing pressure of the stylus pen is equal to or less than a first reference value, the connecting member and the moving member come into contact with each other at the first contact area and / or the second contact area, and the capacitors included in the capacitor unit are electrically connected to the inductor unit.

16. 16. The touch system of claim 15, wherein the plurality of capacitors includes a first capacitor connected to the elastic member, the first capacitor being connected to the inductor unit via the elastic member, the moving member, and the connecting member.

17. a capacitor region including a plurality of capacitors; an elastic member located at a lower end of the capacitor region and in contact with the capacitor region; a moving member located at a lower end of the elastic member and connected between the elastic member and an inductor portion; a connecting member formed to surround the capacitor region, the elastic member, and the outer periphery of the moving member; and a contact area where the moving member and the connecting member come into contact; A stylus pen comprising:

18. 18. The stylus pen according to claim 17, wherein the elastic member includes a spring made of a metallic material.

19. The connecting member is The stylus pen of claim 18, further comprising a conductive area connected to the capacitor area and plated with a conductive material.

20. The stylus pen according to claim 19, wherein the charge stored in the capacitor region is transferred to the contact region via the conductive region.

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