# US 2021/0173545 A1 · Display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0173545 A1 - Document ID: US20210173545A1 - Status: Published application - Kind: A1 - Application number: 17/182,739 - Filed: 2021-02-23 - Published: 2021-06-10 - Earliest claimed: 2018-08-24 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Hayato KURASAWA; Hiroshi MIZUHASHI; Fumitaka GOTOH; Gen KOIDE; Tadayoshi KATSUTA - Web page: https://patentgrep.com/patent/US20210173545A1 ## 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 3/0443: {using a single layer of sensing electrodes} - G02F 1/133: Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements (arrangements or circuits for control of liquid crystal elements in a matrix, not structurally associated with these elements G09G3/36) - G02F 1/1343: Electrodes {(reflective electrodes G02F1/133553)} - G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/04184: {Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally} - 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 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 2203/04111: 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: 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 According to an aspect, a display apparatus includes: a substrate; a plurality of pixel electrodes; a plurality of detection electrodes arranged in a matrix in a display area of the substrate; a plurality of detection electrode lines coupled to the respective detection electrodes; a plurality of first electrodes provided in the same layer as the detection electrodes or the detection electrode lines and extending in a first direction; a plurality of switching elements coupled to the respective pixel electrodes; a plurality of signal lines coupled to the switching elements and extending in a second direction crossing the first direction; a coupling member provided in a peripheral area outside the display area and configured to couple ends of the first electrodes to each other; and a drive circuit configured to output a first drive signal in a first sensing period in which an electromagnetic induction method is used. ## Claims ### Claim 1 A display apparatus comprising: a substrate; a plurality of pixel electrodes; a plurality of detection electrodes arranged in a matrix in a display area of the substrate; a plurality of detection electrode lines coupled to the respective detection electrodes; a plurality of first electrodes provided in the same layer as the detection electrodes or the detection electrode lines and extending in a first direction; a plurality of switching elements coupled to the respective pixel electrodes; a plurality of signal lines coupled to the switching elements and extending in a second direction crossing the first direction; a coupling member provided in a peripheral area outside the display area and configured to couple ends of the first electrodes to each other; and a drive circuit configured to output a first drive signal in a first sensing period in which an electromagnetic induction method is used. ### Claim 2 (depends on 1) The display apparatus according to claim 1, wherein in the first sensing period, the first electrodes are supplied with the first drive signal from the drive circuit to generate a magnetic field, and an electromotive force due to the magnetic field is generated in the signal lines. ### Claim 3 (depends on 1) The display apparatus according to claim 1, wherein in the first sensing period, the signal lines are supplied with the first drive signal from the drive circuit to generate a magnetic field, and an electromotive force due to the magnetic field is generated in the first electrodes. ### Claim 4 (depends on 1) The display apparatus according to claim 1, wherein the first electrodes are provided in the same layer as the detection electrodes, and the detection electrodes arranged in the first direction are provided adjacent to one of the first electrodes in the second direction. ### Claim 5 (depends on 4) The display apparatus according to claim 4, wherein each of the first electrodes and the detection electrodes is formed of a conductive material having translucency, and metallic lines are provided on the first electrodes and in contact with the first electrodes. ### Claim 6 (depends on 4) The display apparatus according to claim 4, wherein each of the detection electrodes includes a plurality of partial detection electrodes, and the partial detection electrodes are electrically coupled to a common detection electrode line via individual detection electrode lines coupled to the respective partial detection electrodes. ### Claim 7 (depends on 6) The display apparatus according to claim 6, wherein each of the first electrodes is provided between the partial detection electrodes adjacent to each other in the second direction. ### Claim 8 (depends on 1) The display apparatus according to claim 1, wherein the detection electrode lines extend in the second direction, and the first electrodes are provided in the same layer as the detection electrode lines and cross the detection electrode lines in a plan view. ### Claim 9 (depends on 8) The display apparatus according to claim 8, wherein each of the detection electrode lines includes a first partial detection electrode line and a second partial detection electrode line, and the first partial detection electrode line and the second partial detection electrode line are placed adjacent to each other in the second direction with a corresponding one of the first electrodes therebetween and are electrically coupled to each other via a bridge line provided in a different layer from the detection electrode lines. ### Claim 10 (depends on 9) The display apparatus according to claim 9, wherein the bridge line is provided in the same layer as the detection electrodes. ### Claim 11 (depends on 9) The display apparatus according to claim 9, wherein each of the first partial detection electrode line and the second partial detection electrode line is placed overlapping with the signal lines in a plan view and includes a coupling part provided at a position not overlapping with the signal lines, and the bridge line is provided in the same layer as the signal lines and couples the coupling part of the first partial detection electrode line and the coupling part of the second partial detection electrode line to each other. ### Claim 12 (depends on 8) The display apparatus according to claim 8, wherein each of the detection electrode lines includes a main line part extending in the second direction and a crossing line part coupled to the main line part and extending in the first direction, each of the first electrodes includes a main part extending in the first direction and a first crossing part and a second crossing part adjacent to each other in the second direction with the crossing line part therebetween, and the first crossing part and the second crossing part are electrically coupled to each other via a bridge line provided in a different layer from the detection electrode lines. ### Claim 13 (depends on 1) The display apparatus according to claim 1, wherein in a second sensing period, the drive circuit supplies a second drive signal to the detection electrodes via the detection electrode lines, and the detection electrodes output signals corresponding to self-capacitances of the respective detection electrodes. ### Claim 14 A display apparatus comprising: a substrate; a plurality of pixel electrodes; a plurality of detection electrodes arranged in a matrix in a display area of the substrate; a plurality of detection electrode lines coupled to the respective detection electrodes; a plurality of switching elements coupled to the respective pixel electrodes; a second electrode provided between a semiconductor of the switching elements and the substrate in a direction perpendicular to the substrate and extending in a first direction; a plurality of first electrodes provided in the same layer as the detection electrodes or the detection electrode lines and extending in a second direction crossing the first direction; a coupling member provided in a peripheral area outside the display area and configured to couple ends of the first electrodes to each other; and a drive circuit configured to output a first drive signal in a first sensing period in which an electromagnetic induction method is used. ### Claim 15 (depends on 14) The display apparatus according to claim 14, wherein in the first sensing period, the first electrodes are supplied with the first drive signal from the drive circuit to generate a magnetic field, and an electromotive force due to the magnetic field is generated in the second electrodes. ### Claim 16 (depends on 14) The display apparatus according to claim 14, wherein in the first sensing period, the second electrodes are supplied with the first drive signal from the drive circuit to generate a magnetic field, and an electromotive force due to the magnetic field is generated in the first electrodes. ### Claim 17 (depends on 14) The display apparatus according to claim 14, wherein the second electrode has light transmittance lower than light transmittance of the substrate. ### Claim 18 (depends on 14) The display apparatus according to claim 14, wherein the first electrodes are provided in the same layer as the detection electrode lines. ### Claim 19 (depends on 14) The display apparatus according to claim 14, wherein the second electrode is coupled to a detection signal output line via a capacitance, and the capacitance includes a first capacitance electrode provided in the same layer as the pixel electrodes; and a second capacitance electrode facing the first capacitance electrode and provided in the same layer as the detection electrodes. ### Claim 20 (depends on 14) The display apparatus according to claim 14, wherein in a second sensing period, the drive circuit supplies a second drive signal to the detection electrodes via the detection electrode lines, and the detection electrodes output signals corresponding to self-capacitances of the respective detection electrodes.