# US 11,112,921 B2 · Touch display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,112,921 B2 - Document ID: US11112921B2 - Status: Granted - Kind: B2 - Application number: 16/537,679 - Filed: 2019-08-12 - Published: 2020-03-19 - Granted: 2021-09-07 - Earliest claimed: 2018-09-14 - Assignees: Au Optronics Corporation - Applicants: AU Optronics Corporation - Inventors: Chia-Chi Lee; Chi-Cheng Chen; Jing-Siang Syu; Shu-Wen Tzeng; Gui-Wen Liu; Zeng-De Chen; Wen-Rei Guo - Web page: https://patentgrep.com/patent/US11112921B2 ## CPC - 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} - G02F 1/13338: {Input devices, e.g. touch panels} - G02F 1/133514: {Colour filters} - 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) - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract A touch display panel includes a first sensing matrix and a second sensing matrix. The first sensing matrix includes a plurality of grid units and a first switch unit. The grid units are arranged in matrix, wherein each grid unit includes at least one first electrode. The first switch unit includes a plurality of switches, and the switches are disposed between adjacent grid units. Wherein, the control end of the switches is configured to receive a first controlling signal, and one end of each of the switches is configured to output a sensing signal. The second sensing matrix includes at least one second electrode, and is configured to receive a common signal. The second sensing matrix includes a plurality of opening units, and each opening unit overlaps with the open area of each pixel circuit in a vertical projection direction of the first substrate. ## Claims ### Claim 1 A touch display panel having a display area and a peripheral area adjacent to the display area, comprising: a first sensing matrix, disposed on one side of a first substrate and the display area, comprising: a plurality of grid units, arranged in matrix, wherein each of the grid units comprises at least one first electrode; and a first switch unit, comprising a plurality of switches, the plurality of switches are disposed adjacent to one side of the plurality of grid units, wherein a control end of the plurality of switches is configured to receive a first controlling signal; one end of each of the switches is electrically connected to one of the plurality of grid units, and the plurality of switches are configured to transmit a sensing signal according to the first controlling signal; a second sensing matrix, disposed on the one side of the first substrate and the display area, and the second sensing matrix comprises at least one second electrode, and is configured to receive a common signal, comprising: a plurality of opening units, each of the plurality of opening units overlaps with an open area of each pixel circuit in a vertical projection direction of the first substrate; and a third sensing matrix, disposed on one side of a second substrate, comprising: a plurality of third electrodes, arranged in matrix, wherein the one side of the first substrate is opposite to one side of the second substrate. ### Claim 2 (depends on 1) The touch display panel of claim 1, wherein the plurality of switches further comprising: a plurality of first switches, disposed adjacent to the one side of the plurality of grid units, wherein a control end of the plurality of first switches is configured to receive the first controlling signal; one end of each of the first switches is configured to output the sensing signal, and another end of the plurality of first switches is electrically connected to one of the plurality of grid units. ### Claim 3 (depends on 1) The touch display panel of claim 1, wherein the plurality of switches further comprising: a plurality of second switches, disposed adjacent to the one side of the plurality of grid units, wherein a control end of the plurality of second switches is configured to receive the first controlling signal; one end of each of the second switches is configured to receive an enable signal, and another end of the plurality of second switches is electrically connected to one of the plurality of grid units. ### Claim 4 (depends on 1) The touch display panel of claim 1, wherein the third sensing matrix further comprising: a fourth electrode, disposed between the plurality of third electrodes, wherein the fourth electrode is electrically insulated from the plurality of third electrodes, and the fourth electrode substantially surrounds the third sensing matrix. ### Claim 5 (depends on 4) The touch display panel of claim 4, wherein a vertical projection of the first switch unit on the one side of the first substrate substantially overlaps the fourth electrode. ### Claim 6 (depends on 1) The touch display panel of claim 1, wherein a part of the plurality of switches are disposed in the peripheral area. ### Claim 7 (depends on 1) The touch display panel of claim 1, wherein the at least one second electrode is electrically connected to each other, and is configured to receive the common signal. ### Claim 8 (depends on 1) The touch display panel of claim 1, wherein the second sensing matrix further comprising: a second switch unit, comprising a plurality of third switches, disposed between the at least one second electrode, wherein a control end of the plurality of third switches is configured to receive a second controlling signal; one end of each of the third switches is configured to receive the common signal, and another end of each of the third switches is electrically connected to the at least one second electrode. ### Claim 9 (depends on 8) The touch display panel of claim 8, wherein a part of the plurality of third switches are disposed in the peripheral area. ### Claim 10 (depends on 8) The touch display panel of claim 8, wherein, in a first stage, disabling the first switch unit and the second switch unit to cause the plurality of grid units and the at least one second electrode keep a floating state, and providing a driving signal to the plurality of third electrodes in sequence to cause the third sensing matrix execute a touching function; and in a second stage, providing the first controlling signal to enable the first switch unit, and providing the second controlling signal to enable the second switch unit, and transmitting the sensing signal from the plurality of grid units to cause the first sensing matrix execute a recognition function and the second sensing matrix and the third sensing matrix execute a force sensing function. ### Claim 11 (depends on 8) The touch display panel of claim 8, wherein, in a first stage, disabling the first switch unit to cause the plurality of grid units and the at least one second electrode keep a floating state, and enabling the second switch unit according to the second controlling signal to cause the at least one second electrode receive the common signal, and providing a driving signal to the plurality of third electrodes in sequence to cause the third sensing matrix execute a touching function; and in a second stage, enabling the first switch unit according to the first controlling signal, and enabling the second switch unit according to the second controlling signal; transmitting the sensing signal from the plurality of grid units to cause the first sensing matrix execute a recognition function and the second sensing matrix and the third sensing matrix execute a force sensing function. ### Claim 12 (depends on 1) The touch display panel of claim 1, wherein a vertical projection of each of the grid units on the one side of the first substrate substantially overlaps each of the third electrodes. ### Claim 13 (depends on 1) The touch display panel of claim 1, further comprising: a color filter, disposed between the second sensing matrix and a display medium; and a pixel array layer, disposed between the second substrate and the third sensing matrix. ### Claim 14 (depends on 1) The touch display panel of claim 1, wherein, in a first stage, disabling the first switch unit to cause the plurality of grid units keep a floating state, and providing a driving signal to the plurality of third electrodes in sequence to cause the third sensing matrix execute a touching function; and in a second stage, providing the first controlling signal to enable the first switch unit, and transmitting the sensing signal from the plurality of grid units to cause the first sensing matrix execute a recognition function. ### Claim 15 A touch display panel having a display area and a peripheral area adjacent to the display area, comprising: a first sensing matrix, disposed on one side of a first substrate and the display area, comprising: a plurality of first data lines; a plurality of first gate lines; a plurality of first units, comprising a plurality of first switches and a plurality of first electrodes, the plurality of first switches comprises a first control end, a first end and a second end, wherein the first control end of each of the first switches is electrically connected to one of the plurality of first gate lines; the first end of each of the first switches is electrically connected to one of the plurality of first data lines; the second end of each of the first switches is electrically connected to one of the plurality of first electrodes; a second sensing matrix, disposed on the one side of the first substrate, and the second sensing matrix comprises at least one second electrode, and is configured to receive a common signal, comprising: a plurality of opening units, each of the plurality of opening units overlaps with an open area of each pixel circuit in a vertical projection direction of the first substrate; and a third sensing matrix, disposed on one side of a second substrate, comprising: a plurality of third electrodes, arranged in matrix. ### Claim 16 A touch display panel having a display area and a peripheral area adjacent to the display area, comprising: a first electrode layer, disposed on one side of a first substrate and the display area, comprising: a grid unit, comprising a first electrode; and a first switch unit, one end of the first switch unit is electrically connected to a sensing data line, and another end of the first switch unit is electrically connected to the grid unit; a second electrode layer, disposed on one side of the first substrate and the display area, and the second electrode layer is configured to receive a common signal, comprising: a second electrode; and an opening unit, overlaps with an open area of a pixel circuit in a vertical projection direction of the first substrate; and a third electrode layer, disposed on one side of a second substrate, comprising: a third electrode; and a fourth electrode, substantially surrounds the third electrode, and the fourth electrode is electrically insulated from the third electrode; and a display array, disposed between the second substrate and the third electrode layer, and the one side of the first substrate is opposite to the one side of the second substrate. ### Claim 17 (depends on 16) The touch display panel of claim 16, wherein the first electrode layer, further comprising: a second switch unit, wherein one end of the second switch unit is electrically coupled to a sensing gate line, and another end of the second switch unit is electrically coupled to the grid unit. ### Claim 18 (depends on 17) The touch display panel of claim 17, the second electrode layer further comprising: a second switch unit, one end of the second switch unit is electrically connected to a common signal line, and another end of the second switch unit is electrically connected to the second electrode.