# US 12,223,152 B2 · Touch input device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,223,152 B2 - Document ID: US12223152B2 - Status: Granted - Kind: B2 - Application number: 18/110,867 - Filed: 2023-02-16 - Published: 2023-06-22 - Granted: 2025-02-11 - Earliest claimed: 2019-11-27 - Assignees: HiDeep Inc. - Applicants: HiDeep Inc. - Inventors: Seyeob Kim; Bonkee Kim; Jongsik Kim; Young Ho Cho - Web page: https://patentgrep.com/patent/US12223152B2 ## CPC - G06F 3/0447: {Position sensing using the local deformation of sensor cells} - G06F 3/0418: {for error correction or compensation, e.g. based on parallax, calibration or alignment} - G06F 3/04186: {Touch location disambiguation} - G06F 3/044: by capacitive means - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F 3/0448: {Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality} - G06F 3/0443: {using a single layer of sensing electrodes} - G06F 2203/04104: Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger - 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: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Disclosed is a touch input device including: a touch sensor including a plurality of electrodes; a drive unit configured to apply a driving signal to at least some of the plurality of electrodes of the touch sensor; a touch signal detection unit configured to detect a touch-position-related signal related to a touch position of an object inputted to the touch surface from at least some of the plurality of electrodes of the touch sensor; and an LGM disturbance signal detection unit configured to detect an LGM-disturbance-signal-related signal related to an LGM disturbance signal generated from the touch surface from at least some of the plurality of electrodes of the touch sensor. ## Claims ### Claim 1 A touch input device having a touch surface, the touch input device comprising: a touch sensor including a plurality of driving electrodes and a plurality of receiving electrodes electrically insulated from the plurality of driving electrodes; a touch detection unit configured to: apply a driving signal to at least one first driving electrode among the plurality of driving electrodes; detect a first receiving signal associated with a touch position of an object input to the touch surface from a first receiving electrode among the plurality of receiving electrodes, detect a second receiving signal associated with a low ground mass (LGM) disturbance signal from a second receiving electrode among the plurality of receiving electrodes; and detect whether or not the object has been touched and a touch position based on a signal obtained by subtracting the second receiving signal from the first receiving signal; wherein the first receiving electrode among the plurality of receiving electrodes forms a mutual capacitance with the first driving electrode, wherein the second receiving electrode among the plurality of receiving electrodes does not form the mutual capacitance with the first driving electrode, wherein, when the driving signal is applied to a second driving electrode different from the first driving electrode by the controller, the first receiving electrode does not form the mutual capacitance with the second driving electrode, and the second receiving electrode forms the mutual capacitance with the second driving electrode, wherein the first receiving signal includes information on the amount of change in capacitance due to the touch of the object and noise information, wherein the second receiving signal includes the noise information, and wherein the noise information includes a display noise information, a change amount information according to a change in an image displayed on a display panel, and a change amount of capacitance due to the LGM disturbance signal generated in a floating state. ### Claim 2 (depends on 1) The touch input device of claim 1, wherein the touch detection unit outputs a first digital data value for the first receiving signal, and a second digital data value for the second receiving signal, and wherein the touch detection unit detects whether or not the object has been touched and the touch position based on a digital data value obtained by subtracting the second digital data value from the first digital data value. ### Claim 3 (depends on 1) The touch input device of claim 1, wherein the touch detection unit subtracts the second receiving signal multiplied by a predetermined factor from the first receiving signal. ### Claim 4 (depends on 1) The touch input device of claim 1, wherein the plurality of driving electrodes and the plurality of receiving electrodes are disposed together on the same layer, wherein the plurality of receiving electrodes are arranged to be spaced apart from each other in a plurality of columns, and wherein the plurality of driving electrodes are arranged so that at least three or more are symmetrical to each other on both sides of each of the receiving electrodes. ### Claim 5 (depends on 4) The touch input device of claim 4, wherein at least one other driving electrode not electrically connected to the first driving electrode is disposed between the first driving electrode and the second receiving electrode. ### Claim 6 A touch input device having a touch surface, the touch input device comprising: a touch sensor including a plurality of driving electrodes and a plurality of receiving electrodes electrically insulated from the plurality of driving electrodes; a touch detection unit configured to: apply a driving signal to at least one first driving electrode among the plurality of driving electrodes; detect a first receiving signal associated with a touch position of an object input to the touch surface from a first receiving electrode among the plurality of receiving electrodes, detect a second receiving signal associated with a low ground mass (LGM) disturbance signal from a second receiving electrode among the plurality of receiving electrodes; and detect whether or not the object has been touched and a touch position based on a signal obtained by subtracting the second receiving signal from the first receiving signal; wherein the first receiving electrode among the plurality of receiving electrodes is immediately adjacent to the first driving electrode, wherein the second receiving electrode among the plurality of receiving electrodes is not immediately adjacent to the first driving electrode, wherein, when the driving signal is applied to a second driving electrode different from the first driving electrode by the controller, the first receiving electrode is not immediately adjacent to the second driving electrode, and the second receiving electrode is immediately adjacent to the second driving electrode, wherein the first receiving signal includes information on the amount of change in capacitance due to the touch of the object and noise information, wherein the second receiving signal includes the noise information, and wherein the noise information includes a display noise information, a change amount information according to a change in an image displayed on a display panel, and a change amount of capacitance due to the LGM disturbance signal generated in a floating state. ### Claim 7 (depends on 6) The touch input device of claim 6, wherein the touch detection unit outputs a first digital data value for the first receiving signal, and a second digital data value for the second receiving signal, and wherein the touch detection unit detects whether or not the object has been touched and the touch position based on a digital data value obtained by subtracting the second digital data value from the first digital data value. ### Claim 8 (depends on 6) The touch input device of claim 6, wherein the touch detection unit subtracts the second receiving signal multiplied by a predetermined factor from the first receiving signal. ### Claim 9 (depends on 6) The touch input device of claim 6, wherein the plurality of driving electrodes and the plurality of receiving electrodes are disposed together on the same layer, wherein the plurality of receiving electrodes are arranged to be spaced apart from each other in a plurality of columns, and wherein the plurality of driving electrodes are arranged so that at least three or more are symmetrical to each other on both sides of each of the receiving electrodes. ### Claim 10 (depends on 9) The touch input device of claim 9, wherein at least one other driving electrode not electrically connected to the first driving electrode is disposed between the first driving electrode and the second receiving electrode. ### Claim 11 A touch sensor, the touch sensor comprises: a plurality of driving electrodes; and a plurality of receiving electrodes electrically insulated from the plurality of driving electrodes, wherein, when a driving signal is applied to at least one first driving electrode among the plurality of driving electrodes, a first receiving signal is output from at least one first receiving electrode immediately adjacent to the first driving electrode among the plurality of receiving electrodes and a second receiving signal is output from at least second receiving electrode that is not immediately adjacent to the first driving electrode among the plurality of receiving electrodes, wherein, when the driving signal is applied to at least one second driving electrode immediately adjacent to the second receiving electrode among the plurality of driving electrodes, a third receiving signal is output from the second receiving electrode, and a fourth receiving signal is output from the first receiving electrode, wherein the first and third receiving signals include information on the amount of change in capacitance due to the touch of the object and a noise information, wherein the second and fourth detection signals include the noise information, and wherein the noise information includes a display noise information, a change amount information according to a change in an image displayed on a display panel, and a change amount of capacitance due to the low ground mass (LGM) disturbance signal generated in a floating state. ### Claim 12 (depends on 11) The touch sensor of claim 11, wherein the plurality of driving electrodes and the plurality of receiving electrodes are disposed together on the same layer, wherein the plurality of receiving electrodes are arranged to be spaced apart from each other in a plurality of columns, and wherein the plurality of driving electrodes are arranged so that at least three or more are symmetrical to each other on both sides of each of the receiving electrodes. ### Claim 13 (depends on 12) The touch sensor of claim 12, wherein at least one other driving electrode not electrically connected to the first driving electrode is disposed between the first driving electrode and the second receiving electrode.