# US 10,871,696 B2 · Electrochromic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,871,696 B2 - Document ID: US10871696B2 - Status: Granted - Kind: B2 - Application number: 16/082,045 - Filed: 2017-05-08 - Published: 2020-04-16 - Granted: 2020-12-22 - Earliest claimed: 2016-05-09 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Dong Hyun Lee; Chang Yoon Lim; Su Hee Lee; Doo Hoon Song; Jae Sung Han - Web page: https://patentgrep.com/patent/US10871696B2 ## CPC - G02F 1/155: Electrodes - G02F 1/1533: {structural features not otherwise provided for} - G02F 2001/1502: {complementary cell} - G02F 2001/1536: {additional, e.g. protective, layer inside the cell} - G02F 2001/1552: {Inner electrode, e.g. the electrochromic layer being sandwiched between the inner electrode and the support substrate} - 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 The present invention relates to an electrochromic device, and according to one aspect of the present invention, there is provided an electrochromic device comprising: a first electrode layer; a first electrochromic layer provided on the first electrode layer; an electrolyte layer provided on the first electrochromic layer; a second electrochromic layer provided on the electrolyte layer; and a second electrode layer provided on the second electrochromic layer, wherein it comprises a first auxiliary electrode layer and a second auxiliary electrode layer each provided on each opposite surface of the first electrochromic layer and the second electrochromic layer opposed to each other with the electrolyte layer interposed therebetween. ## Claims ### Claim 1 An electrochromic device comprising: a first electrode layer; a first electrochromic layer provided on the first electrode layer; an electrolyte layer provided on the first electrochromic layer; a second electrochromic layer provided on the electrolyte layer; a second electrode layer provided on the second electrochromic layer; a first auxiliary electrode layer on a top surface of the first electrochromic layer so that the first auxiliary electrode layer is between the first electrode and the electrolyte layer; and a second auxiliary electrode layer on a bottom surface of the second electrochromic layer so that the second auxiliary electrode layer is between the second electrode and the electrolyte layer, wherein the electrolyte layer interposed is between the first auxiliary electrode layer and second auxiliary electrode layer. ### Claim 2 (depends on 1) The electrochromic device according to claim 1, wherein the first and second auxiliary electrode layers are arranged asymmetrically on the basis of the electrolyte layer. ### Claim 3 (depends on 1) The electrochromic device according to claim 1, wherein the first and second auxiliary electrode layers are formed in a metal mesh or metal strip pattern. ### Claim 4 (depends on 1) The electrochromic device according to claim 1, wherein the first and second auxiliary electrode layers each comprise an electrode portion formed of a metal material and an insulation portion surrounding said electrode portion so as to insulate said electrode portion. ### Claim 5 (depends on 4) The electrochromic device according to claim 4, wherein said insulation portion is formed of a resin material. ### Claim 6 (depends on 4) The electrochromic device according to claim 4, wherein said insulation portion is formed of a resin of acrylate or epoxy series. ### Claim 7 (depends on 5) The electrochromic device according to claim 5, wherein said insulation portion further comprises an inorganic filler or an inorganic filling agent. ### Claim 8 (depends on 4) The electrochromic device according to claim 4, wherein said insulation portion has a width of 5 mm or less and a thickness of 2 mm or less. ### Claim 9 (depends on 4) The electrochromic device according to claim 4, wherein said electrode portion has a width of 3 mm or less and a thickness of 1 mm or less. ### Claim 10 An electrochromic device comprising: a first electrode layer; a first electrochromic layer provided on the first electrode layer; an electrolyte layer provided on the first electrochromic layer; a second electrochromic layer provided on the electrolyte layer; a second electrode layer provided on the second electrochromic layer; a first auxiliary electrode layer on a top surface of the first electrode layer so that the first auxiliary electrode layer is between the first electrode and the electrolyte layer; and a second auxiliary electrode layer on a bottom surface of the second electrode layer so that the second auxiliary electrode layer is between the first electrode and the electrolyte layer, wherein the electrolyte layer interposed is between the first auxiliary electrode layer and second auxiliary electrode layer. ### Claim 11 (depends on 10) The electrochromic device according to claim 10, wherein the first and second auxiliary electrode layers are formed in a metal mesh or metal strip pattern. ### Claim 12 (depends on 10) The electrochromic device according to claim 10, wherein the first and second auxiliary electrode layers each comprise an electrode portion formed of a metal material and an insulation portion surrounding said electrode portion so as to insulate said electrode portion. ### Claim 13 (depends on 12) The electrochromic device according to claim 12, wherein said insulation portion is formed of a resin material. ### Claim 14 (depends on 12) The electrochromic device according to claim 12, wherein said insulation portion is formed of a resin of acrylate or epoxy series. ### Claim 15 (depends on 13) The electrochromic device according to claim 13, wherein said insulation portion further comprises an inorganic filler or an inorganic filling agent. ### Claim 16 (depends on 12) The electrochromic device according to claim 12, wherein said insulation portion has a width of 5 mm or less and a thickness of 2 mm or less. ### Claim 17 (depends on 12) The electrochromic device according to claim 12, wherein said electrode portion has a width of 3 mm or less and a thickness of 1 mm or less. ### Claim 18 (depends on 11) The electrochromic device according to claim 11, wherein the first and second auxiliary electrode layers are arranged asymmetrically on the basis of the electrolyte layer. ### Claim 19 (depends on 1) The electrochromic device according to claim 1, wherein the first auxiliary electrode layer and the second auxiliary electrode layer fit within grooves in the electrolyte layer. ### Claim 20 (depends on 10) The electrochromic device according to claim 10, wherein the first auxiliary electrode layer fits within grooves in the first electrochromic layer and the second auxiliary electrode layer fits within grooves in the second electrochromic layer.