Touch pen

Abstract

A stylus according to an exemplary embodiment includes: an inductor unit; and a capacitor unit including a plurality of first capacitors connected in parallel to the inductor unit, a connection 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 contacting the connection 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.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority and benefits of Korean Patent Application No. 10 - 2024 - 0016179, filed with the Korean Intellectual Property Office on February 1, 2024, and Korean Patent Application No. 10 - 2024 - 0131015, filed with the Korean Intellectual Property Office on September 26, 2024, the entire contents of which are incorporated herein by reference. Technical field

[0003] This disclosure relates to a stylus pen. Background art

[0004] Various terminals such as mobile phones, smartphones, tablet computers, laptop computers, digital broadcast terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), and navigation devices are equipped with touch sensors.

[0005] In such terminals, the touch sensor may be located on the display panel that displays an image, or may be located in the area of the terminal body. When a user interacts with the terminal by touching the touch sensor, the terminal can provide an intuitive user interface to the user.

[0006] A user can use a stylus pen to make precise touches. Such a stylus pen can send signals to and / or receive signals from the touch sensor in an electrical and / or magnetic manner. Summary of the invention

[0007] This disclosure attempts to provide a stylus pen that can effectively receive magnetic signals from and send magnetic signals to an electronic device.

[0008] An exemplary embodiment of this disclosure provides a stylus pen, including: an inductor unit; and a capacitor unit including a plurality of first capacitors connected in parallel to the inductor unit, a connection 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 contacting the connection 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.

[0009] Another exemplary embodiment of this disclosure provides a touch system, including: a stylus pen including an inductor unit and a capacitor unit, the inductor unit including an inductor connection unit, the capacitor unit including a movable member moved by the inductor connection unit and an elastic member connected to the movable member at an upper end thereof; and a touch screen including a touch electrode layer that receives a resonant electromagnetic signal from the stylus pen.

[0010] Another exemplary embodiment of the present disclosure provides a stylus, comprising: 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 unit; a connection member formed to surround outer edges of the capacitor region, the elastic member, and the movable member; and a contact region in which the movable member and the connection member are in contact with each other. Description of the Drawings

[0011] Figure 1 is a conceptual diagram showing a stylus and an electronic device.

[0012] Figure 2 is a schematic diagram showing a signal transmission operation between the stylus and the electronic device.

[0013] Figure 3 is a schematic diagram showing a signal transmission operation between the stylus and the electronic device.

[0014] Figure 4 is a schematic diagram showing a signal transmission operation between the stylus and the electronic device.

[0015] Figure 5 is a diagram showing a stylus according to a comparative example.

[0016] Figure 6 is a diagram showing elements included in a housing of a stylus according to a comparative example.

[0017] Figure 7 is a diagram showing a state in which the connection member and the movable member are in contact with each other in a hovering state.

[0018] Figure 8 is a circuit diagram of a stylus according to a comparative example.

[0019] Figure 9 is a diagram showing a state in which the connection member and the movable member are in contact with each other in a hovering state.

[0020] Figure 10 is a circuit diagram of a stylus according to a comparative example.

[0021] Figure 11 is a diagram showing a stylus according to an exemplary embodiment.

[0022] Figure 12 is a diagram showing a stylus according to an exemplary embodiment.

[0023] Figure 13 is a diagram showing a pen pressure sensing unit and a connection unit of the stylus.

[0024] Figure 14This is a diagram showing a connecting member.

[0025] Figure 15 This is a diagram showing a movable member.

[0026] Figure 16 This is a diagram showing a stylus in which a connecting member and a movable member according to an exemplary embodiment are in contact with each other.

[0027] Figure 17 This is a circuit diagram of a stylus in a hovering state according to an exemplary embodiment.

[0028] Figure 18 This is a diagram showing a stylus in which a connecting member and a movable member according to an exemplary embodiment are in contact with each other.

[0029] Figure 19 This is a circuit diagram of a stylus in a hovering state according to an exemplary embodiment.

[0030] Figure 20 This is a diagram showing a stylus in which a connecting member and a movable member according to an exemplary embodiment are separated from each other.

[0031] Figure 21 This is a circuit diagram of a stylus in a contact state according to an exemplary embodiment. Detailed Description

[0032] Hereinafter, several exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present disclosure pertains can easily implement these embodiments. The present disclosure can be implemented in various different forms and is not limited to the exemplary embodiments described herein.

[0033] To clearly explain the present disclosure, parts irrelevant to the description will be omitted, and throughout the specification, the same or similar components will be denoted by the same reference numerals.

[0034] Throughout the specification, unless explicitly stated to the contrary, when a part is referred to as "including" a certain component, this means that other components are present and the presence of other components is not excluded.

[0035] Figure 1 This is a conceptual diagram showing a stylus and an electronic device.

[0036] Referring to Figure 1 , the stylus 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 send the signal to the touch screen 30.

[0037] Figures 2 to 4 Separate diagrams show the stylus 10 at Figure 1 and Figure 1Schematic diagram of a signal transmission operation between the electronic device 20.

[0038] Referring to Figure 2 , the touch screen 30a may include a digital converter 31, a display panel 32, a touch electrode layer 33, and a window 34. Regarding an electromagnetic resonance (EMR) type pen in a passive stylus, when the digital converter 31 sends a magnetic signal B to the EMR type stylus 10, a resonance circuit included in the stylus 10 may resonate based on the magnetic signal B. Then, the digital converter 31 may receive the resonating magnetic signal B from the stylus 10.

[0039] The digital converter 31 may be attached below the display panel 32 and may include a flexible printed circuit board (FPCB) formed with a plurality of conductive antenna loops and a ferrite sheet that blocks the magnetic field generated by the antenna loops and blocks eddy currents that may be generated in other electronic components or parts when the antenna loops form a magnetic field.

[0040] In the FPCB, a plurality of antenna loops for detecting the input position of a resonance signal may be formed in a plurality of layers. One antenna loop may overlap with at least one other antenna loop in the Z-axis direction. Accordingly, the thickness of the FPCB increases, making it difficult to make the electronic device 20 thinner and smaller.

[0041] If such a digital converter 31 is installed on a foldable / flexible electronic device 20, when the foldable / flexible electronic device 20 is folded, the FPCB attached to the foldable area of the foldable / flexible electronic device 20 may be deformed. As the foldable / flexible electronic device 20 is repeatedly folded, this may cause stress on the wiring members forming the antenna loops, ultimately resulting in damage to the wiring members. The ferrite sheet may block the influence of the magnetic field generated by the antenna loops 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 may be damaged as the electronic device 20 is repeatedly folded.

[0042] Referring to Figure 3 , the touch screen 30b may include a display panel 32, a touch electrode layer 33, and a window 34.

[0043] When the electrodes of the touch electrode layer 33 send a magnetic signal B to the stylus 10, a resonance circuit included in the stylus 10 may resonate based on the magnetic signal B. The electrodes of the touch electrode layer 33 may receive the resonating electromagnetic signal E and / or B from the stylus 10. In the case where the electrodes of the touch electrode layer 33 are formed of a metal mesh having a low resistance, the magnetic signal from the stylus 10 may be detected.

[0044] Similarly, compared with the digital converter 31, the touch screen 30b does not require an additional unit or module to send a magnetic signal to the stylus 10, and thus, the touch screen 30a can be made thin, which is advantageous in terms of manufacturing cost.

[0045] Referring Figure 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 sends a magnetic signal B to the stylus 10, a resonant circuit included in the stylus 10 may resonate based on the magnetic signal B. Then, electrodes of the touch electrode layer 33 may receive the resonant electromagnetic signal E and / or B from the stylus 10.

[0046] Compared with the digital converter 31, the loop coil 35 does not receive the magnetic signal B for detecting the touch position, and thus, the wiring structure is simple, making the touch screen 30c thinner. Advantageously, the electronic device 20 can be made thin and small. In addition, the loop coil 35 can be formed in various sizes at various positions, and thus, such a touch screen 30c can also be applied to a foldable / flexible electronic device 20.

[0047] The loop coil 35 may include a substrate on which an 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 and the substrate. In this case, the antenna loop may be formed of a conductive material exhibiting high transmittance and low impedance, such as a metal mesh, ITO, graphene, or silver nanowire. In addition, the antenna loop may be located under the window. In this case, the substrate may not be included in the loop coil 35.

[0048] 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 shown as a single layer in Figure 4 , the first touch electrodes and the second touch electrodes may be located in different layers, may be overlapped with each other, may not be overlapped with each other, or may be placed using a separate layer inserted between two layers, and is not limited thereto.

[0049] Figure 5 is a diagram showing a stylus according to a comparative example.

[0050] Referring Figure 5 , the stylus 10 may include a resonant circuit unit 12 within a housing 11. The resonant circuit unit 12 is a unit that can Figure 1An LC resonance circuit that resonates with the drive signal output by the touch screen 30. The drive signal may include a signal (e.g., a sine wave or a square wave) having a frequency corresponding to the resonance frequency of the resonance circuit unit 12. For example, the resonance circuit unit 12 may resonate based on the magnetic signal B received from Figure 2 the digital converter 31, Figure 3 the touch electrode layer 33, or Figure 4 the toroidal coil 35. In order for resonance to occur, it is required that the resonance frequency of the resonance circuit unit 12 be equal to or very close to the frequency of the drive signal. At this time, the resonance frequency of the stylus 10 follows the design value of the resonance circuit unit 12.

[0051] The components included in the stylus 10 may be accommodated in the housing 11. The housing 11 may have a shape similar to a cylindrical shape, a polygonal column shape, a column shape with at least a partially curved surface, an entasis shape, a frustum shape of a pyramid, a frustum shape, etc., but is not limited thereto. Since the inside of the housing 11 is hollow, the components of the stylus 10, such as the resonance circuit unit 12, may be accommodated inside the housing 11. Such a housing 11 may be made of a non-conductive material.

[0052] The resonance circuit unit 12 may include an inductor unit 14 and a capacitor unit 13. The inductor unit 14 may include a ferrite core 15 and a coil 16. The core body 17 passes through the ferrite core 15, and the coil 16 is wound around the outer surface of the ferrite core 15. In the ferrite core 15, for example, a through hole having a predetermined diameter (e.g., 1 mm) may be formed in the axial direction to allow the core body 17 to be inserted and pass through the ferrite material having a cylindrical shape, for example. The coil 16 may be wound around the ferrite core 15 over the entire axial length or a part of the axial length of the ferrite core 15. The coil 16 may be electrically connected to the capacitor unit 13.

[0053] The capacitor unit 13 may include a plurality of capacitors connected in parallel to each other. The plurality of capacitors may have different capacitances. The structure of the capacitor unit 13 may be changed based on the pen pressure, which is the pressure applied by the stylus 10 to the touch screen 30. For example, the capacitor unit 13 may determine the connection state of each capacitor in the plurality of capacitors based on the pen pressure.

[0054] One end of the core body 17 may be a nib protruding from the ferrite core 15. The core body 17 may be composed of an electrode core made of a hard resin mixed with a conductor (e.g., a conductive metal or conductive powder).

[0055] Figure 6 is a diagram showing the components included in the housing of the stylus according to the comparative example.

[0056] Refer to Figure 6, the stylus 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 pen pressure sensing unit 132. The capacitance of the capacitor unit 13 may be calculated by adding the respective capacitances of the plurality of capacitors 131a, 131b, 131c, and 131d. The number of the plurality 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 pen pressure sensing unit 132. Accordingly, the capacitance of the capacitor unit 13 changes based on the movement of the pen pressure sensing unit 132, and the resonance frequency of the resonance circuit unit 12 may be changed by the changed capacitance.

[0057] The plurality of capacitors 131a, 131b, 131c, and 131d may be located at the upper end of the capacitor unit 13 in the first axis (Z) direction. Among the plurality of capacitors 131a, 131b, 131c, and 131d, the first capacitors 131a, 131b, and 131c may be connected in parallel with 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. Among the plurality of capacitors 131a, 131b, 131c, and 131d, one end of the second capacitor 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 connected to the other end of the inductor unit 14.

[0058] The pen pressure sensing unit 132 may release the connection of the second capacitor 131d connected in parallel to the first capacitors 131a, 131b, and 131c based on the pen pressure, which is the pressure applied by the stylus 10 to Figure 1 the touch screen 30. The pen pressure sensing unit 132 in contact with the core 17 in the first axis (Z) direction may move by the pressure applied by Figure 1 the touch screen 30 to the core 17. When the pen pressure sensing unit 132 moves, the second capacitor 131d may be disconnected from the first capacitors 131a, 131b, and 131c. The pen pressure sensing unit 132 may include a connection member 61, an inductor connection unit 141, a movable member 62, and movement restricting members 63 and 64.

[0059] The connection member 61 may include portions of the first signal line 611 and the second signal line 612. The first signal line 611 may connect one end of the first contact M1 and the inductor unit 14, and connect the fourth contact M4 and the other end of the inductor unit 14. The second signal line 612 may connect one end of the third contact M3 and the third signal line 621, and connect the fourth contact M4 and the other end of the third signal line 621. At this time, the third contact M3 may be connected to the first contact M1 through the fourth signal line 631, and the fourth contact M4 may be connected to the second contact M2 through the fifth signal line 632. The first capacitors 131a, 131b, and 131c may be connected in parallel with each other 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.

[0060] A cavity may be included inside the connection member 61. Through the cavity, the inductor connection unit 141 may move in the first axis (Z) direction.

[0061] The inductor connection unit 141 may move the movable member 62 in the first axis (Z) direction. When the stylus 10 applies pressure to the touch screen 30, the pressure transmitted to the core 17 is transmitted to the movable member 62 through the inductor connection unit 141, and the movable member 62 may move in the first axis (Z) direction. The inductor connection unit 141 may pass through the connection member 61 and may be connected to the movable member 62. One end of the inductor connection unit 141 may be connected to the core 17. The other end of the inductor connection unit 141 may be physically connected to the movable member 62 by passing through the connection member 61.

[0062] The movable member 62 may include the third signal line 621. In a state where the movable member 62 and the connection 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. At this time, the third signal line 621 may be electrically connected to the second signal line 612 in the first contact area 65 and the second contact area 66. In a state where the movable member 62 and the connection 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 through the third contact M3, the fourth signal line 631, and the first contact M1.

[0063] The position of the movable member 62 can be changed based on the pen pressure of the stylus 10. The movable member 62 can contact the connecting member 61 in the first axis (Z) direction of the connecting member 61. When the stylus 10 applies pressure to the touch screen 30, the core 17 can move the movable member 62 in the first axis (Z) direction through the inductor connection unit 141. At this time, the movable member 62 moving in the first axis (Z) direction can be separated from the connecting member 61.

[0064] While the movable member 62 and the connecting member 61 are separated, the third signal line 621, the first signal line 611, and the second signal line 612 can be disconnected from each other in an electrical connection. In a state where the movable member 62 and the connecting member 61 are separated from each other, one end of the second capacitor 131d can be not connected to the inductor unit 14.

[0065] The first movement restricting member 63 and the second movement restricting member 64 can restrict the movement of the movable member 62 in the first axis (Z) direction. When the stylus 10 applies pressure to the touch screen 30, the movable member 62 can move in the first axis (Z) direction. At this time, the first movement restricting member 63 and the second movement restricting 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.

[0066] The first movement restricting member 63 can contact the movable member 62 in the first axis (Z) direction of the movable member 62. The second movement restricting member 64 can contact the first movement restricting member 63 in the first axis (Z) direction of the first movement restricting member 63.

[0067] When the stylus 10 applies pressure to the touch screen 30, the second movement restricting member 64 and the first movement restricting member 63 can come into close contact. At this time, in order to relieve the impact applied from the first movement restricting member 63 to the second movement restricting member 64, the second movement restricting member 64 can be formed in a hemispherical shape. In this case, the shape of the second movement restricting member 64 is not limited to a hemispherical shape and can be an oval shape instead of a hemispherical shape.

[0068] In an exemplary embodiment, the first movement restricting member 63 can be formed in a cuboid shape. By forming the first movement restricting member 63 in a cuboid shape, the pressure applied by the first movement restricting member 63 on the second movement restricting member 64 can be dispersed.

[0069] The inductor unit 14 may include a ferrite core 15 and a coil 16. A core body 17 passes through the ferrite core 15, and the coil 16 is wound around the outer surface of the ferrite core 15. The coil 16 wound around the outer surface of the ferrite core 15 may be connected to one end and the other end of first capacitors 131a, 131b, and 131c. In addition, the coil 16 wound around the outer surface of the ferrite core 15 may be connected to the other end of a second capacitor 131d.

[0070] Figure 7 FIG. is a view showing a state in which a connection member and a movable member are in contact with each other in a hovering state.

[0071] Before explaining Figure 7 the hovering state may refer to Figure 1 the stylus pen 10 not being in contact with Figure 1 the touch screen 30. However, the distance between the stylus pen 10 and Figure 1 the electronic device 20 may be close enough to transmit and receive electromagnetic signals E and / or B. That is, the Figure 5 resonant circuit unit 12 of the stylus pen 10 may receive a magnetic signal from Figure 1 the electronic device 20.

[0072] The hovering state may also mean that the stylus pen 10 is in contact with the touch screen 30, but a pressure corresponding to a weight of about +1 g less than the weight of the stylus pen is applied to the touch screen 30. On the other hand, the contact state may refer to a state in which a pressure corresponding to a weight of about +1 g greater than or equal to the weight of the stylus pen 10 is applied to the touch screen 30.

[0073] The stylus pen 10 in the hovering state may perform different functions from the stylus pen 10 in the contact state. The stylus pen 10 in the hovering state may adjust the cursor position or perform a specific function without physically contacting the touch screen 30. For example, in the hovering state, a cursor or pointer may be displayed on the screen to visually confirm the position of the pen. Some software may also display preview information for tools or menus. In addition, functions different from the contact state may be set in the hovering state, such as switching screens by making a specific gesture such as a swipe.

[0074] Referring to Figure 7 , the stylus pen 10 in the hovering state may not be in contact with the touch screen ( Figure 1 30 of ). Thus, the connection member 61 may be in contact with the movable member 62, and Figure 6 the second signal line 612 of and Figure 6The third signal line 621 can be electrically connected to each other through the first contact area 65 and the second contact area 66. All of one end and the other end of the first capacitor to the third capacitor C1 to C3 can be connected to the inductor unit 14. However, one end of the fourth capacitor C4 can be connected to the connection member 61, and the other end of the fourth capacitor C4 can be connected to the inductor unit 14.

[0075] Figure 8 is a circuit diagram of the stylus in the hovering state according to the comparative example.

[0076] Reference Figure 7 and Figure 8 , the first contact N1 and the second contact N2 can be electrically connected to each other. Therefore, the fourth capacitor C4 can be connected in parallel to the first capacitor to the third capacitor C1 to C3. When the fourth capacitor C4 is connected in parallel to Figure 5 the capacitor unit 13 of

[0077] In the hovering state, Figure 1 of the stylus 10 of Figure 5 the resonance circuit unit 12 can resonate based on the changed capacitance of the capacitor unit 13. At this time, the capacitance of the resonance circuit unit 12 can be calculated based on the capacitances of the first capacitor to the fourth capacitor C1 to C4 connected in parallel. Figure 1 The electronic device 20 of

[0078] Figure 9 can receive the resonance electromagnetic signals E and / or B from the stylus 10. The electronic device 20 can receive an input from the stylus 10 in the hovering state based on the resonance electromagnetic signals E and / or B.

[0079] Reference Figure 9 , in the hovering state of Figure 1 the stylus 10 can not contact Figure 1 the touch screen 30 of

[0080] Due to the mass production deviation of the components of the connection member 61 and the movable member 62 and the penetration of foreign substances, the connection member 61 and the movable member 62 may contact each other only in the second contact area 66 of the first contact area 65 and the second contact area 66 in the hovering state. Therefore, Figure 6 The second signal line 612 of Figure 6 and the third signal line 621 of

[0081] Figure 10 is a circuit diagram of the stylus in the hovering state according to the comparative example.

[0082] Reference Figure 9 and Figure 10 , the first contact N1 and the second contact N2 can be electrically disconnected from each other. Therefore, the fourth capacitor C4 can be disconnected from the first capacitor to the third capacitor C1 to C3. Since the fourth capacitor C4 is disconnected from Figure 5 the capacitor unit 13 of Figure 10 the capacitance of the capacitor unit 13 in Figure 8 can be different from the capacitance of the capacitor unit 13 in

[0083] Figure 1 The stylus 10 of Figure 5 The resonant circuit unit 12 of Figure 1 can resonate based on the capacitance of the capacitor unit 13. At this time, the capacitance of the resonant circuit unit 12 can be calculated based on the capacitance of the first capacitor to the third capacitor C1 to C3 connected in parallel. Even in the hovering state, the stylus 10 can send the resonant electromagnetic signals E and / or B to

[0084] Figure 11 is a diagram showing the stylus according to an exemplary embodiment.

[0085] Reference Figure 11 , the stylus 10 can include the same components as Figure 5 the stylus 10 of Figure 5 . However, different from

[0086] the stylus 10 of Figure 6any one of a plurality of capacitors 131a to 131d and Figure 6 between the connecting member 61 of

[0087] Figure 12 is a diagram of a stylus shown according to an exemplary embodiment.

[0088] Figure 12 The stylus 10 may include components the same as those of the stylus 10 or Figure 6 However, compared with the stylus 10 or Figure 6 the stylus 10 may additionally include an elastic member 121. The elastic member 121 of the stylus 10 will be described in detail.

[0089] The elastic member 121 may be connected to the fifth signal line 632 through the fourth contact M4. The second capacitor 131d may be provided 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 through the second contact M2.

[0090] The elastic member 121 is provided between the fourth contact M4 and the movable member 62 and may be in contact with the movable member 62. The elastic member 121 may be electrically connected to the third signal line 621 included in the movable member 62. Therefore, one end of the second capacitor 131d may be electrically connected to the inductor unit 14.

[0091] The third signal line 621 may be electrically connected to the second signal line 612 through the first contact area 65 and the second contact area 66. At this time, even if the third signal line 621 is connected to the second signal line 612 only in one of the first contact area 65 and the second contact area 66, one end of the second capacitor 131d may be electrically connected to the inductor unit 14.

[0092] The movable member 62 may compress the elastic member 121 in the first axis (Z) direction, and the movable member 61 may move in the first axis direction according to the compression degree of the elastic member 121 compressed in the first axis (Z) direction. By adjusting the strength of the metal material, the elastic member 121 may control the moving distance of the movable member 62, and at this time, the strength of the metal material and the moving distance of the movable member 62 may be inversely proportional.

[0093] When the stylus 10 is moved toward Figure 1When pressure is applied to the touch screen 30, the pressure transmitted to the core body 17 is transmitted to the movable member 62 through the inductor connection unit 141, and the movable member 62 can compress the elastic member 121 in the first axis (Z) direction. At this time, the movable member 62 can be separated from the connection member 61, and the third signal line 621 and the first signal line 611 and the second signal line 612 can be disconnected from each other electrically. Therefore, one end of the second capacitor 131d and the inductor unit 14 can be disconnected from each other.

[0094] Figure 13 FIG. is a diagram showing a pen pressure sensing unit and a connection unit of a stylus pen.

[0095] Reference Figure 13 , Figure 12 The pen pressure sensing unit 132 of can include a connection member 61 and a movable member 62. Figure 11 The connection unit 133 of can include an elastic member 121. The connection member 61 and the movable member 62 can be in contact with each other in the first contact area 65. For ease of explanation, the Figure 12 second contact area 66 of is omitted.

[0096] The connection member 61 can be formed to surround the outer edges of the capacitor area 134, the elastic member 121, and the movable member 62 in the first axis (Z) direction. The elastic member 121 can be disposed between the capacitor area 134 and the movable member 62. The capacitor area 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.

[0097] When the stylus pen 10 applies pressure to the Figure 1 touch screen 30 of, the movable member 62 can move in the first axis (Z) direction. The movable member 62 can compress the elastic member 121 in the first axis (Z) direction. In addition, the movable member 62 can be separated from the connection member 61 in the first contact area 65 without contacting the connection member 61.

[0098] Figure 14 FIG. is a diagram showing the connection member.

[0099] Reference Figure 14 , the connection member 61 can include a conductive area 661 and a contact area 662. The conductive area 661 can refer to an area coated or plated with a conductor material. The conductor can include metals such as copper, aluminum, or silver and non-metals such as graphite.

[0100] The contact area 662 can include where the connection member 61 is in contact with Figure 13The area in contact with the movable member 62. The contact area 662 can also be an area coated or plated with a conductor material. When the connecting member 61 contacts the movable member 62, current can flow through the conductive area 661 to the contact area 662. For example, the charge accumulated in Figure 13 The capacitor unit 13 in can pass through Figure 12 The second signal line 612 of transfers the charge from the conductive area 661 to the contact area 662. Alternatively, the charge can be transferred from the contact area 662 to Figure 13 The capacitor unit 13 of through the conductive area 661 and the second signal line 612.

[0101] Figure 15 FIG. is a diagram showing a movable member.

[0102] Referring to Figure 15 , the movable member 62 can include a conductive area 671. The conductive area 671 can refer to an area coated or plated with a conductor material. The conductor can include metals such as copper, aluminum, or silver and non-metals such as graphite, for example.

[0103] The conductive area 671 can include the area where the movable member 62 contacts the Figure 14 Connecting member 61 of. When the movable member 62 contacts the connecting member 61, current can flow through the conductive area 671. For example, the charge accumulated in Figure 13 The capacitor unit 13 in can pass through Figure 12 The second signal line 612 of and Figure 12 The third signal line 621 of transfers the charge to the conductive area 671. Alternatively, the charge can be transferred from the conductive area 671 to the capacitor unit 13 through the second signal line 612 and the third signal line 621.

[0104] Figure 16 FIG. is a diagram showing a stylus in which a connecting member and a movable member contact each other according to an exemplary embodiment.

[0105] Referring to Figure 16 , in the hovering state, Figure 1 The stylus 10 of can be in a state where no pressure is applied to Figure 1 The touch screen 30 of. Therefore, the connecting member 161 can contact the movable member 162 through the first contact area 164 and the second contact area 165.

[0106] One end and the other end of all of the first capacitor to the third capacitor C11, C12, and C13 can be connected to the inductor unit 166. However, one end of the fourth capacitor C4 can be connected to the elastic member 163, and the other end of the fourth capacitor C4 can be connected to the inductor unit 166. Since the connecting member 161 and the movable member 162 contact each other, Figure 12The second signal line 612 and Figure 12 the third signal line 621 of

[0107] Figure 17 is a circuit diagram of a stylus in a hovering state according to an exemplary embodiment.

[0108] Referring to Figure 16 and Figure 17 , the elastic member SP can be connected in series to the fourth capacitor C14, and the first contact N1 and the second contact N2 can be connected in series to the elastic member SP. At this time, the first contact N1 and the second contact N2 can be connected in parallel to each other. Since the first contact N1 and the second contact N2 are not disconnected, the fourth capacitor C14 can be connected in parallel to the first capacitor to the third capacitor C11, C12, and C13 through the first contact N1 or the second contact N1.

[0109] In the hovering state, Figure 1 of the stylus 10 Figure 11 the resonance circuit unit 12 of Figure 11 can resonate based on the capacitance of the capacitor unit 13 of Figure 1 At this time, the capacitance of the resonance circuit unit 12 can be calculated based on the capacitance of the first capacitor to the fourth capacitor C1 to C4 connected in parallel. Figure 1 The electronic device 20 of

[0110] Figure 18 is a diagram showing a stylus in which a connection member and a movable member are in contact with each other according to an exemplary embodiment.

[0111] Referring to Figure 18 , the stylus 10 in the hovering state <^ Figure 1 can be in a state where no pressure is applied to Figure 1 the touch screen 30 of

[0112] Figure 19 is a circuit diagram of a stylus in a hovering state according to an exemplary embodiment.

[0113] Referring to Figure 18 and Figure 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 to the elastic member SP. At this time, the first contact N1 and the second contact N2 may be connected in parallel to each other.

[0114] Since the first contact point N1 and the second contact point N2 are connected in parallel to each other, the fourth capacitor C14 can be connected to the first contact point N1 even if either the first contact point N1 or the second contact point N2 is disconnected. Figure 12 The capacitor unit 13 is connected to the fourth capacitor C14 in parallel with the first to third capacitors C11, C12, and C13 via the second contact N2 even if the first contact N1 is disconnected. On the other hand, the fourth capacitor C14 is connected to the first to third capacitors C11, C12, and C13 in parallel via the first contact N1 even if the second contact N2 is disconnected.

[0115] By arranging the first contact point N1 and the second contact point N2 in parallel, the fourth capacitor C14 can be connected to the capacitor unit 13 even if the first contact point N1 or the second contact point N2 is disconnected due to a defect in the hovering state.

[0116] In the hover state, Figure 1 Stylus 10 Figure 11 The resonance circuit unit 12 may resonate based on the capacitance of the capacitor unit 13. At this time, the capacitance of the resonance circuit unit 12 may be calculated based on the capacitances of the first to fourth capacitors C11, C12, C13, and C14 connected in parallel. Figure 1 The electronic device 20 may receive the resonant electromagnetic signal E and / or B from the stylus pen 10. The electronic device 20 may receive an input from the stylus pen 10 based on the resonant electromagnetic signal E and / or B in the hovering state.

[0117] Figure 20 is a diagram illustrating a stylus pen in which a connection member and a movable member are separated from each other according to an exemplary embodiment.

[0118] refer to Figure 20 , in contact state Figure 1 The stylus pen 10 can be used to Figure 1 The touch screen 30 is in a state where a pressure corresponding to a weight greater than or equal to the weight of the stylus pen 10 + 1 g is applied. Figure 12 The inductor connection unit 141 can make the movable member 202 move in the first axis (Z) direction. The movable member 202 can compress the elastic member 203 in the first axis (Z) direction and can be separated from the connection member 201. Figure 12 The second signal line 612 and Figure 12 The third signal lines 621 may be disconnected from each other.

[0119] Figure 21 It is a circuit diagram of a stylus in a hovering state according to an exemplary embodiment.

[0120] Referring to Figure 20 and Figure 21 , the elastic member SP can be connected in series to the fourth capacitor C14, and each of the first contact N1 and the second contact N2 can be connected in series to the elastic member SP. At this time, the first contact N1 and the second contact N2 can be connected in parallel with each other.

[0121] In the contact state, the first contact N1 and the second contact N2 can both be disconnected. When both the first contact N1 and the second contact N2 are disconnected, the fourth capacitor C14, the inductor L2, and the capacitors C11, C12, and C13 can be disconnected from each other. Therefore, the first capacitor to the third capacitor C11, C12, and C13 except the fourth capacitor C14 can be connected in parallel.

[0122] In the contact state, Figure 1 of the stylus 10 Figure 11 resonant circuit unit 12 can resonate based on Figure 11 the capacitance of the capacitor unit 13. At this time, the capacitance of the resonant circuit unit 12 can be calculated based on the capacitance of the first capacitor to the third capacitor C11, C12, and C13 connected in parallel. Figure 1 The electronic device 20 can receive the resonant electromagnetic signals E and / or B from the stylus 10. The electronic device 20 can receive an input from the stylus 10 based on the resonant electromagnetic signals E and / or B in the contact state.

[0123] Although the exemplary embodiments of the present disclosure have been described in detail above, the scope of the present disclosure is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concepts of the present disclosure defined in the following claims also fall within the scope of the present disclosure.

Claims

1. A stylus pen, comprising: An inductor unit; And A capacitor Unit, which includes: a plurality of first capacitors connected in parallel to the inductor unit; a connection member, which includes a first signal line connected to one end of each of the plurality of first capacitors; a movable member, which includes a second signal line connected to the first signal line when contacting the connection member; a conductive elastic member connected to the second signal line; and a second capacitor, which is connected between the elastic member and the other end of each of the plurality of first capacitors.

2. The stylus pen according to claim 1, wherein The inductor unit includes: A ferrite core; And A coil wound around the outer surface of the ferrite core, one end of the coil is connected to one end of each of the plurality of first capacitors, and the other end of the coil is connected to the other end of each of the plurality of first capacitors.

3. The stylus pen according to claim 2, further comprising: A core body passing through the ferrite core, Wherein, the pressure transmitted to one side of the core body is transmitted to the movable member.

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

5. The stylus pen according to claim 4, wherein When the elastic member is compressed, the movable member and the connection member are separated from each other, and the first signal line and the second signal line are electrically disconnected from each other.

6. The stylus pen according to claim 3, further comprising: An inductor moving unit connected to the other side of the core body, which passes through the connection member to contact the movable member and transmits pressure to the movable member.

7. The stylus pen according to claim 1, wherein The connection member includes a contact area as the first signal line, The movable member includes a conductive area as the second signal line, and When the movable member contacts the connection member, the contact area and the conductive area are electrically connected to each other.

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

9. The stylus pen according to claim 1, wherein The capacitor unit further includes a movement limiting member for limiting the movement of the movable member.

10. The stylus pen according to claim 9, wherein The movement limiting member includes a first movement limiting member and a second movement limiting member, and the second movement limiting member contacts the first movement limiting member at the upper end of the first movement limiting member.

11. A touch system, comprising: A stylus pen, which includes an inductor unit and a capacitor unit, the inductor unit includes an inductor connection unit, the capacitor unit includes a movable member moved by the inductor connection unit and an elastic member connected to the movable member at the upper end of the movable member; And A touch screen, which includes a touch electrode layer for receiving a resonant electromagnetic signal from the stylus pen.

12. The touch system according to claim 11, wherein The stylus further includes a connection member connecting the inductor unit and the capacitor unit, and the connection member is formed to contact the movable member at an upper end of the movable member.

13. The touch system according to claim 12, wherein Based on the pen pressure of the stylus, the connection member and the movable member contact each other in a first contact area and a second contact area different from the first contact area, and the first contact area and the second contact area are plated with a conductive material.

14. The touch system according to claim 13, wherein When the pen pressure of the stylus exceeds a first reference value, the connection member and the movable member are separated from each other.

15. The touch system according to claim 13, wherein When the pen pressure of the stylus is lower than or equal to the first reference value, the connection member and the movable member contact each other in the first contact area and / or the second contact area, and a plurality of capacitors included in the capacitor unit are electrically connected to the inductor unit.

16. The touch system according to claim 15, wherein The plurality of capacitors includes a first capacitor connected to the elastic member, and the first capacitor is connected to the inductor unit through the elastic member, the movable member, and the connection member.

17. A stylus, comprising: A capacitor area including a plurality of capacitors; An elastic member located at a lower end of the capacitor area and contacting the capacitor area; A movable member located at a lower end of the elastic member and connected between the elastic member and an inductor unit; A connection member formed to surround an outer edge of the capacitor area, the elastic member, and the movable member; And A contact area in which the movable member and the connection member contact each other.

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

19. The stylus according to claim 18, wherein The connection member includes a conductive area connected to the capacitor area and plated with a conductive material.

20. The stylus according to claim 19, wherein Charge accumulated in the capacitor area is transferred to the contact area through the conductive area.

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