# US 12,223,142 B2 · Touch sensing device and touch sensing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,223,142 B2 - Document ID: US12223142B2 - Status: Granted - Kind: B2 - Application number: 18/509,988 - Filed: 2023-11-15 - Published: 2024-05-16 - Granted: 2025-02-11 - Earliest claimed: 2022-11-15 - Assignees: Lx Semicon Co., Ltd. - Applicants: Lx Semicon Co., Ltd. - Inventors: Young Eun Lee - Web page: https://patentgrep.com/patent/US12223142B2 ## CPC - G06F 3/04166: {Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184)} - G06F 3/04186: {Touch location disambiguation} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract In an aspect of the present disclosure, a touch sensing device is provided. The touch sensing device includes: a first circuit configured to supply a driving signal to a touch electrode of a panel; a second circuit configured to sense a change in capacitance of the touch electrode caused by a user touch; and a third circuit configured to: calculate a touch coordinate based on the sensed capacitance change; determine a touch area based on the touch coordinate; and determine the user touch as either a normal touch or a grip touch based on a touch ratio between touch nodes placed on each of a plurality of lines of the panel and the touch area. ## Claims ### Claim 1 A touch sensing device comprising: a first circuit configured to supply a driving signal to a touch electrode of a panel; a second circuit configured to sense a change in capacitance of the touch electrode; and a third circuit including: a touch signal processor configured to generate sensing data including a sensing value for each touch node based on the sensed capacitance change; a coordinate calculator configured to calculate a touch presence and a touch coordinate based on the sensing data; and a touch determiner configured to determine a user touch as either a normal touch or a grip touch based on a touch ratio between touch nodes placed on each of a plurality of lines of the panel and a touch area, wherein the touch determiner includes: a touch area determiner configured to determine the touch area based on the touch coordinate, wherein the touch area has a first touch area, a second touch area located around the first touch area, and a third touch area placed between the first touch area and the second touch area; and a ratio calculator configured to calculate the touch ratio between touch nodes placed on each of at least two lines among the plurality of lines when the touch coordinate is located within the third touch area. ### Claim 2 (depends on 1) The touch sensing device of claim 1, wherein the third circuit is configured to: output touch information including the calculated touch coordinate based on that the user touch is determined as the normal touch; or skip outputting the touch information based on that the user touch is determined as the grip touch. ### Claim 3 (depends on 1) The touch sensing device of claim 1, wherein the touch ratio is a touch ratio between a plurality of first touch nodes placed on a first line among the plurality of lines and a plurality of second touch nodes placed on a second line among the plurality of lines. ### Claim 4 (depends on 3) The touch sensing device of claim 3, wherein the third circuit is configured to: calculate a ratio between a first sum of sensing values of the plurality of first touch nodes and a second sum of sensing values of the plurality of second touch nodes as the touch ratio; and determine the user touch as the normal touch based on that the touch ratio is greater than or equal to a first threshold. ### Claim 5 (depends on 4) The touch sensing device of claim 4, wherein the third circuit is configured to: calculate the first sum by summing sensing values of touched first touch nodes among the plurality of first touch nodes; and calculate the second sum by summing sensing values of touched second touch nodes among the plurality of second touch nodes. ### Claim 6 (depends on 3) The touch sensing device of claim 3, wherein the first line comprises at least one of a leftmost line or a rightmost line, and wherein the second line comprises a line located closest to the first line. ### Claim 7 (depends on 3) The touch sensing device of claim 3, wherein the third circuit is configured to: determine the user touch as the normal touch based on that a number of touched first touch nodes among the plurality of first touch nodes is smaller than a second threshold; or determine the user touch as either the normal touch or the grip touch depending on the touch ratio based on that the number of the touched first touch nodes among the plurality of first touch nodes is greater than or equal to the second threshold. ### Claim 8 (depends on 1) The touch sensing device of claim 1, wherein the panel comprises the first touch area, the second touch area, and the third touch area, and wherein the third circuit is configured to determine the touch area as one of the first touch area, the second touch area, and the third touch area based on the touch coordinate. ### Claim 9 (depends on 8) The touch sensing device of claim 8, wherein the third circuit is configured to determine the user touch as the grip touch based on that the touch area is the second touch area. ### Claim 10 (depends on 8) The touch sensing device of claim 8, wherein the third circuit is configured to: determine the user touch as the normal touch based on that the touch area is the first touch area; determine the user touch as either the normal touch or the grip touch depending on the touch ratio based on that the touch area is the third touch area. ### Claim 11 (depends on 8) The touch sensing device of claim 8, further comprising a buffer configured to store history information including a touch type representing either the normal touch or the grip touch for each frame. ### Claim 12 (depends on 11) The touch sensing device of claim 11, wherein the third circuit is configured to: check the history information stored in the buffer for at least one previous frame based on that the touch area is the first touch area. ### Claim 13 (depends on 12) The touch sensing device of claim 12, wherein the third circuit is configured to: determine the user touch as the grip touch based on that the touch type for the at least one previous frame is the grip touch, or determine the user touch as the normal touch based on that the touch type for the at least one previous frame is not the grip touch. ### Claim 14 (depends on 11) The touch sensing device of claim 11, wherein the third circuit is configured to: check the history information stored in the buffer for at least one previous frame based on that the touch area is the second touch area; and determine the user touch as the grip touch based on that there is no touch history for the at least one previous frame. ### Claim 15 (depends on 1) The touch sensing device of claim 1, wherein the touch determiner further includes: a touch type determiner configured to determine a touch type based on the touch area determined by the touch area determiner and the touch ratio calculated by the ratio calculator, and a touch information processor configured to process touch information based on the touch type determined by the touch type determiner. ### Claim 16 A touch sensing method comprising: supplying a driving signal to a touch electrode of a panel; sensing a change in capacitance of the touch electrode; generating a sensing data including a sensing value for each of touch node based on the sensed capacitance change; calculating a touch presence and a touch coordinate based on the sensing data; and determining a user touch as either a normal touch or a grip touch based on a touch ratio between touch nodes placed on each of a plurality of lines of the panel and a touch area, wherein the determining the user touch includes; determining the touch area based on the touch coordinate, wherein the touch area has a first touch area, a second touch area located around the first touch area, and a third touch area placed between the first touch area and the second touch area; and calculating the touch ratio between touch nodes placed on each of at least two lines among the plurality of lines when the touch coordinate is located within the third touch area. ### Claim 17 (depends on 16) The touch sensing method of claim 16, comprising: outputting touch information including the calculated touch coordinate based on that the user touch is determined as the normal touch; or skipping outputting the touch information based on that the user touch is determined as the grip touch. ### Claim 18 (depends on 16) The touch sensing method of claim 16, wherein the touch ratio is a touch ratio between a plurality of first touch nodes placed on a first line among the plurality of lines and a plurality of second touch nodes placed on a second line among the plurality of lines. ### Claim 19 (depends on 18) The touch sensing method of claim 18, wherein the determining the user touch as either the normal touch or the grip touch comprises: calculating a ratio between a first sum of sensing values of the plurality of first touch nodes and a second sum of sensing values of the plurality of second touch nodes as the touch ratio; and determining the user touch as the normal touch based on that the touch ratio is greater than or equal to a first threshold. ### Claim 20 (depends on 18) The touch sensing method of claim 18, wherein the determining the user touch as either the normal touch or the grip touch comprises: checking a number of touched first touch nodes among the plurality of first touch nodes; and determining the user touch as the grip touch based on that the number of the touched first touch nodes among the plurality of first touch nodes is smaller than a second threshold; or determining the user touch as either the normal touch or the grip touch depending on the touch ratio based on that the number of the touched first touch nodes among the plurality of first touch nodes is greater than or equal to the second threshold. ### Claim 21 (depends on 16) The touch sensing method of claim 16, wherein the panel comprises the first touch area, the second touch area, and the third touch area, and wherein the touch area is determined as one of the first touch area, the second touch area, and the third touch area based on the touch coordinate.