# US 12,602,121 B2 · Touch device for passive resonant stylus, driving method for the same and touch system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,602,121 B2 - Document ID: US12602121B2 - Status: Granted - Kind: B2 - Application number: 18/963,891 - Filed: 2024-11-29 - Published: 2025-03-20 - Granted: 2026-04-14 - Earliest claimed: 2021-01-29 - Assignees: HiDeep Inc. - Applicants: HiDeep Inc. - Inventors: Seyeob Kim; Bonkee Kim; Hyoungwook Woo; Hojun Moon; Hwanhee Lee; Jongsik Kim; Youngho Cho - Web page: https://patentgrep.com/patent/US12602121B2 ## CPC - G06F 3/03545: {Pens or stylus} - G06F 3/038: Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry - G06F 3/0416: {Control or interface arrangements specially adapted for digitisers} - G06F 3/0443: {using a single layer of sensing electrodes} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F 3/046: by electromagnetic means - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/04162: {for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware} - G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads} - G06F 3/0441: {using active external devices, e.g. active pens, for receiving changes in electrical potential transmitted by the digitiser, e.g. tablet driving signals} - G06F 3/0442: {using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser} - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - G06F 2203/0384: Wireless input, i.e. hardware and software details of wireless interface arrangements for pointing devices - G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper - G06F 2203/04106: Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection - G06F 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds - G06F 2203/04111: Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate - G06F 2203/04112: Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract An embodiment of the present invention provides a touch device for sensing a position of a stylus including a resonance circuit, including: a plurality of electrode; and a touch controller configured to receive a sensing signal from the electrodes to determine a position of the stylus, wherein the electrodes includes electrodes in which directions of currents induced in the electrodes by the resonance circuit are opposite to each other. ## Claims ### Claim 1 A touch device for sensing a position of a stylus including a resonance circuit, comprising: a display panel; a window positioned on the display panel; a plurality of electrodes positioned between the display panel and the window; and a touch controller configured to receive a sensing signal from the electrodes to determine a position of the stylus close to the window, wherein directions of currents induced in two electrodes of the plurality of electrodes by the resonance circuit are opposite to each other, and wherein the touch controller determines a position of the stylus based on positions of electrodes having a largest difference in magnitude of the induced currents. ### Claim 2 (depends on 1) The touch device of claim 1, wherein some of the electrodes are positioned in a touch area, and the touch device further includes a plurality of traces positioned at an edge of the touch area and connected to correspond to the electrodes, wherein the traces include traces in which directions of currents indu ced-induced in the traces by the resonance circuit are opposite to each other. ### Claim 3 (depends on 2) The touch device of claim 2, wherein a current in a same direction as that of correspondingly connected traces is induced in the electrodes. ### Claim 4 (depends on 2) The touch device of claim 2, wherein a current in a different direction from that of correspondingly connected connected traces is induced in the electrodes. ### Claim 5 (depends on 2) The touch device of claim 2, wherein the electrodes include a plurality of first electrodes extending in a first direction, and the tracers include first traces extending in a second direction intersecting the first direction and connected to first ends of a first group of the first electrodes, and second traces connected to second ends of a second group of the first electrodes. ### Claim 6 (depends on 1) The touch device of claim 1, further comprising an antenna configured to include a plurality of dummy electrodes formed on a same layer as that of the electrodes and a plurality of bridges connecting the dummy electrodes to each other, wherein the touch controller applies a driving signal to the antenna to output an electro-magnetic signal for resonating the resonance circuit. ### Claim 7 (depends on 1) The touch device of claim 1, wherein each of the electrodes includes two signal input terminals, and the touch controller grounds one of the two signal input terminals and applies a driving signal to the other so that each of the electrodes outputs an electro-magnetic signal for resonating the resonance circuit. ### Claim 8 (depends on 1) The touch device of claim 1, wherein each of the electrodes includes two signal input terminals, and the touch controller applies driving signals of opposite phases to the two signal input terminals so that each of the electrodes outputs an electro-magnetic signal for sensing the resonance circuit. ### Claim 9 (depends on 1) The touch device of claim 1, further comprising a magnetic field shielding layer formed on a different layer from that of the electrodes. ### Claim 10 (depends on 9) The touch device of claim 9, wherein the display panel has a folding area that is bent about a folding axis and a non-folding area spaced apart by the folding area, and the magnetic field shielding layer is positioned to correspond to both the folding area and the non-folding area. ### Claim 11 (depends on 9) The touch device of claim 9, wherein the display panel has a folding area that is bent about a folding axis and a non-folding area spaced apart by the folding area, and the magnetic field shielding layer is spaced apart to correspond to the non-folding area. ### Claim 12 (depends on 1) The touch device of claim 1, wherein the electrodes are formed of a metal mesh. ### Claim 13 A driving method for a touch device for sensing a position of a stylus including a resonance circuit driving, comprising: outputting a driving signal to a plurality of electrodes; receiving a sensing signal from the electrodes, the sensing signal including currents induced in the electrodes in opposite directions by the resonance circuit; and determining the position of the stylus from the sensing signal, wherein the determining of the position of the stylus includes determining a position of the stylus based on positions of electrodes having a largest difference in magnitude of the induced currents. ### Claim 14 (depends on 13) The driving method of claim 13, wherein some of the electrodes are positioned in a touch area, the touch device further includes a plurality of traces positioned at an edge of the touch area and connected to correspond to the electrodes, and the sensing signal includes currents induced in the tracers in opposite directions by the resonance circuit. ### Claim 15 (depends on 14) The driving method of claim 14, wherein a current in a same direction as that of correspondingly connected traces is induced in the electrodes. ### Claim 16 (depends on 14) The driving method of claim 14, wherein a current in a different direction from that of correspondingly connected traces is induced in the electrodes. ### Claim 17 A touch system comprising: a stylus configured to include a resonance circuit; and a touch sensor configured to receive a sensing signal from a plurality of electrodes to determine a position of the stylus, wherein directions of currents induced in two electrodes of the plurality of electrodes by the resonance circuit are opposite to each other, wherein the touch sensor determines a position of the stylus based on positions of electrodes having a largest difference in magnitude of the induced currents. ### Claim 18 (depends on 17) The touch system of claim 17, wherein some of the electrodes are positioned in a touch area, the touch sensor further includes a plurality of traces positioned at an edge of the touch area and connected to correspond to the electrodes, and wherein the traces include traces in which directions of currents induced in the traces by the resonance circuit are opposite to each other.