# US 2016/0259452 A1 · Touch panel and display device including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0259452 A1 - Document ID: US20160259452A1 - Status: Published application - Kind: A1 - Application number: 15/049,530 - Filed: 2016-02-22 - Published: 2016-09-08 - Earliest claimed: 2015-03-04 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Hee Young LEE; Suk CHOI; Hyeon Jeong SANG - Web page: https://patentgrep.com/patent/US20160259452A1 ## CPC - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F 3/0443: {using a single layer of sensing electrodes} - G06F 3/047: using sets of wires, e.g. crossed wires - G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices - 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) ## Abstract A touch panel, including a polyurethane substrate; a touch electrode including a first electrode layer on the polyurethane substrate, the first electrode including nanowires; and a polyurethane overcoat layer on the touch electrode, the polyurethane overcoat layer having an in-plane phase difference smaller than that of the polyurethane substrate. ## Claims ### Claim 1 A touch panel, comprising: a polyurethane substrate; a touch electrode including a first electrode layer on the polyurethane substrate, the first electrode including nanowires; and a polyurethane overcoat layer on the touch electrode, the polyurethane overcoat layer having an in-plane phase difference smaller than that of the polyurethane substrate. ### Claim 2 (depends on 1) The touch panel as claimed in claim 1, wherein the touch electrode further includes a second electrode layer on the polyurethane overcoat layer, the second electrode layer including a transparent conductive material. ### Claim 3 (depends on 2) The touch panel as claimed in claim 2, further comprising a primer layer between one or more of the polyurethane substrate and the first electrode layer or the polyurethane overcoat layer and the second electrode layer. ### Claim 4 (depends on 3) The touch panel as claimed in claim 3, wherein the primer layer includes a polyimide or a varnish material, the varnish material including an epoxy-based material, an amino-based material, an urido-based material, a mercapto-based material, or an isocyanate-based material. ### Claim 5 (depends on 2) The touch panel as claimed in claim 2, wherein the transparent conductive material includes one or more of a carbon nanotube, conductive polymer, graphene, indium tin oxide (ITO), indium zinc oxide (IZO), IGZO, ZnO, ZnSnO, or SnO. ### Claim 6 (depends on 1) The touch panel as claimed in claim 1, wherein the polyurethane overcoat layer fills a gap between the metal nanowires. ### Claim 7 (depends on 1) The touch panel as claimed in claim 1, wherein the polyurethane overcoat layer includes polyurethane formed by combining glycol and diisocyante. ### Claim 8 (depends on 7) The touch panel as claimed in claim 7, wherein the diisocyanate includes one or more of 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 4,4′-diphenylmethane diisocyanate, or polymethylene diisocyanate. ### Claim 9 (depends on 1) The touch panel as claimed in claim 1, wherein an in-plane phase difference of the polyurethane overcoat layer is 2 nm or less for a wavelength of 550 nm. ### Claim 10 (depends on 1) The touch panel as claimed in claim 1, wherein the metal nanowires are silver nanowires. ### Claim 11 A touch panel, comprising: a display panel; a touch panel including a polyurethane substrate, a touch electrode including a first electrode layer on the polyurethane substrate, and a polyurethane overcoat layer on the touch electrode, the first electrode layer including nanowires, and the polyurethane overcoat layer having an in-plane phase difference smaller than that of the polyurethane substrate; and a cover window on the touch panel. ### Claim 12 (depends on 11) The touch panel as claimed in claim 11, wherein the display panel is an organic light emitting diode display or a liquid crystal display. ### Claim 13 (depends on 11) The touch panel as claimed in claim 11, wherein the touch electrode further includes a second electrode layer on the polyurethane overcoat layer, the second electrode including a transparent conductive material. ### Claim 14 (depends on 13) The touch panel as claimed in claim 13, further comprising a primer layer between one or more of the polyurethane substrate and the first electrode layer or the polyurethane overcoat layer and the second electrode layer. ### Claim 15 (depends on 14) The touch panel as claimed in claim 14, wherein the primer layer includes a polyimide or a varnish material, the varnish material including an epoxy-based material, an amino-based material, an urido-based material, a mercapto-based material, or an isocyanate-based material. ### Claim 16 (depends on 13) The touch panel as claimed in claim 13, wherein the transparent conductive material includes one or more of a carbon nanotube, conductive polymer, graphene, indium tin oxide (ITO), indium zinc oxide (IZO), IGZO, ZnO, ZnSnO, or SnO. ### Claim 17 (depends on 11) The touch panel as claimed in claim 11, wherein the polyurethane overcoat layer fills a gap between the metal nanowires. ### Claim 18 (depends on 11) The touch panel as claimed in claim 11, wherein the polyurethane overcoat layer includes polyurethane formed by combining glycol and diisocyante. ### Claim 19 (depends on 18) The touch panel as claimed in claim 18, wherein the diisocyanate includes one or more of 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 4,4′-diphenylmethane diisocyanate, or polymethylene diisocyanate. ### Claim 20 (depends on 11) The touch panel as claimed in claim 11, wherein an in-plane phase difference of the polyurethane overcoat layer is 2 nm or less for a wavelength of 550 nm. ### Claim 21 (depends on 11) The touch panel as claimed in claim 11, wherein the metal nanowires are silver nanowires.