# US 10,871,845 B2 · Touch display panel and touch display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,871,845 B2 - Document ID: US10871845B2 - Status: Granted - Kind: B2 - Application number: 16/722,839 - Filed: 2019-12-20 - Published: 2020-06-25 - Granted: 2020-12-22 - Earliest claimed: 2018-12-21 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: YongChan Park; Jinseong Kim; Haewon Lee; JuHan Kim - Web page: https://patentgrep.com/patent/US10871845B2 ## CPC - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads} - 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 3/0418: {for error correction or compensation, e.g. based on parallax, calibration or alignment} - G06F 3/04184: {Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally} - 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 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Disclosed are a touch display panel and a touch display device. In a touch display panel and a touch display device, a shielding pattern is arranged between a data link line and a touch link line in a non-active area of the touch display panel, and a signal corresponding to the touch driving signal is applied to the shielding pattern. Parasitic capacitance between the data link line and the touch link line is prevented in order to reduce noise on the touch sensing signal caused by voltage fluctuation on the data link line. Accordingly, it is possible to reduce the influence of display driving on touch sensing, thereby improving touch sensing during display driving. ## Claims ### Claim 1 A touch display panel, comprising: at least one driving circuit for driving a plurality of data lines and a plurality of touch lines arranged in an active area of the touch display panel; a plurality of data link lines disposed in a non-active area of the touch display panel and electrically connected between the driving circuit and each of the plurality of data lines; a plurality of touch link lines disposed in the non-active area and electrically connected between the driving circuit and each of the plurality of touch lines, at least a portion of the touch link lines overlapping with at least one of the plurality of data link lines; and a shielding pattern disposed in the non-active area and disposed between the plurality of data link lines and the plurality of touch link lines, the shielding pattern overlapping at least a portion of the plurality of touch link lines. ### Claim 2 (depends on 1) The touch display panel of claim 1, wherein the plurality of data link lines comprise: a plurality of first data link lines electrically connected to the driving circuit; and a plurality of second data link lines electrically connected between each of the plurality of first data link lines and each of the plurality of data lines, and wherein the shielding pattern is disposed between the plurality of first data link lines and the plurality of touch link lines. ### Claim 3 (depends on 2) The touch display panel of claim 2, wherein the plurality of first data link lines are disposed between a buffer layer and a gate insulation layer and the plurality of second data link lines are disposed on the gate insulation layer. ### Claim 4 (depends on 2) The touch display panel of claim 2, wherein the plurality of first data link lines are formed of a gate metal disposed on the touch display panel and the plurality of second data link lines are formed of a source metal and a drain metal disposed on the touch display panel. ### Claim 5 (depends on 2) The touch display panel of claim 2, wherein the shielding pattern is further disposed between the plurality of second data link lines and the plurality of touch link lines. ### Claim 6 (depends on 1) The touch display panel of claim 1, wherein the shielding pattern is electrically connected to the driving circuit or at least one of the plurality of touch link lines. ### Claim 7 (depends on 1) The touch display panel of claim 1, further comprising: a dummy pixel area located outside the active area, in which a dummy pixel electrode and a dummy common electrode are disposed. ### Claim 8 (depends on 7) The touch display panel of claim 7, wherein the shielding pattern is formed integrally with at least one of the dummy pixel electrode and the dummy common electrode disposed outside the active area. ### Claim 9 (depends on 2) The touch display panel of claim 2, wherein the first data link line and the second data link line are electrically connected to each other through at least one contact hole included in an insulation layer disposed between the first data link line and the second data link line. ### Claim 10 (depends on 2) The touch display panel of claim 2, wherein the first data link line and the second data link line are electrically connected to each other by a jumping pad made of the same material as the shielding pattern. ### Claim 11 (depends on 10) The touch display panel of claim 10, wherein the shielding pattern is not disposed in the area of the jumping pad and is insulated from the jumping pad, and wherein at least a portion of the shielding pattern is disposed between the plurality of second data link lines and the plurality of touch link lines. ### Claim 12 (depends on 2) The touch display panel of claim 2, wherein the first data link line and the second data link line are electrically connected to each other by a jumping pad made of the same material as the touch link line, and wherein the plurality of touch link lines are arranged to bypass an area where the first data link line and the second data link line are electrically connected to each other. ### Claim 13 (depends on 2) The touch display panel of claim 2, wherein the first data link line and the second data link line are electrically connected to each other by a double jumping structure made of the same material as the plurality of touch link lines and the same material as a common electrode or a pixel electrode. ### Claim 14 (depends on 2) The touch display panel of claim 2, wherein the shielding pattern is disposed in the same layer as the plurality of second data link lines and is insulated from the plurality of second data link lines. ### Claim 15 (depends on 7) The touch display panel of claim 7, wherein the shielding pattern is electrically connected to at least one of the driving circuit, the plurality of touch link lines, the dummy pixel electrode and the dummy common electrode disposed outside the active area. ### Claim 16 (depends on 2) The touch display panel of claim 2, wherein the driving circuit is configured to output a pulse-shaped touch driving signal to at least one of the touch link lines during at least a part of a display driving period. ### Claim 17 (depends on 16) The touch display panel of claim 16, wherein the driving circuit is configured to output a data voltage modulated based on the touch driving signal to at least one of the first data link lines during the display driving period. ### Claim 18 (depends on 1) The touch display panel of claim 1, wherein the driving circuit is configured to output a pulse-shaped touch driving signal to the plurality of touch link lines during at least a touch sensing period, and to output a signal corresponding to the touch driving signal to the shielding pattern during at least the touch sensing period, and wherein the signal corresponding to the touch driving signal is either identical to the touch driving signal or has an identical phase and identical voltage difference as those of the touch driving signal. ### Claim 19 (depends on 7) The touch display panel of claim 7, wherein the touch display panel is configured to apply a common voltage to the dummy pixel electrode and the dummy common electrode in a display driving period. ### Claim 20 (depends on 7) The touch display panel of claim 7, wherein the dummy pixel electrode and the dummy common electrode are in the floating state during a display driving period. ### Claim 21 (depends on 7) The touch display panel of claim 7, wherein the dummy common electrode is electrically connected to the shielding pattern such that the same signal are applied to the dummy common electrode and the shielding pattern. ### Claim 22 (depends on 19) The touch display panel of claim 19, wherein the dummy pixel area further comprises a dummy gate line and/or a dummy data line, and the touch display panel is configured to apply the common voltage to the dummy data line and to apply a scan signal to the dummy gate line. ### Claim 23 (depends on 1) A touch display device comprising the touch display panel according to any one of claim 1.