# US 12,007,659 B2 · Apparatus to maintain a continuously graded transmission state > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,007,659 B2 - Document ID: US12007659B2 - Status: Granted - Kind: B2 - Application number: 17/819,451 - Filed: 2022-08-12 - Published: 2023-02-09 - Granted: 2024-06-11 - Earliest claimed: 2018-12-31 - Assignees: Sage Electrochromics, Inc. - Applicants: Sage Electrochromics, Inc. - Inventors: Yigang Wang; Cody Daniel VanDerVeen; Peter Bocek - Web page: https://patentgrep.com/patent/US12007659B2 ## CPC - G02F 1/155: Electrodes - G02F 1/1525: {characterised by a particular ion transporting layer, e.g. electrolyte} - G02F 1/163: Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor - E06B 9/24: Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; {Slat blinds}(operating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00) - E06B 2009/2464: {featuring transparency control by applying voltage, e.g. LCD, electrochromic panels} - G02F 2201/56: Substrates having a particular shape, e.g. non-rectangular - 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 - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) ## Abstract An apparatus including a substrate with at least three sides and an active stack on the substrate. The active stack can include a first transparent conductive layer, a second transparent conductive layer, an anodic electrochemical layer, and a cathodic electrochemical layer. The apparatus can also include a first bus bar set comprising a plurality of bus bars, wherein each bus bar of the first bus bar set is electrically coupled to the first transparent conductive layer, a second bus bar set comprising a plurality of bus bars, wherein each bus bar of the second bus bar set is electrically coupled to the second transparent conductive layer, and a bus bar arrangement wherein the bus bar arrangement comprises a bus bar from the first bus bar set and a bus bar from the second bus bar set on at least three sides of the substrate. ## Claims ### Claim 1 An apparatus comprising: a substrate comprising at least four sides; an active stack on the substrate, the active stack comprising: a first transparent conductive layer; and a second transparent conductive layer; a first bus bar set comprising a plurality of bus bars, wherein each bus bar of the first bus bar set is electrically coupled to the first transparent conductive layer; a second bus bar set comprising a plurality of bus bars, wherein each bus bar of the second bus bar set is electrically coupled to the second transparent conductive layer, and a bus bar arrangement wherein the bus bar arrangement comprises a first bus bar from the first bus bar set wrapping around a first corner, a second bus bar from the first bus bar set wrapping around a second corner, a bus bar from the second bus bar set between the first bus bar of the first bus bar set and the second bus bar of the first bus bar set, wherein a bus bar from the first bus bar set and the second bus bar set disposed along at least two sides of the substrate, wherein the bus bar arrangement alternates between a bus bar from the first bus bar set and a bus bar from the second bus bar set along the periphery of the substrate, and wherein only a bus bar from the second bus bar set is on at least one side of the substrate. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the first corner is where two sides of the at least four sides of the substrate meet. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein wrapping around the first corner comprises the first bus bar from the first bus bar set continuously going from one side of the two sides of the first corner to a second side of the two sides of the first corner. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein each bus bar is separated by a gap. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the active stack further comprises: an anodic electrochemical layer between the first transparent conductive layer and the second transparent conductive layer; and a cathodic electrochemical layer between the first transparent conductive layer and the second transparent conductive layer. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the first corner is different from the second corner. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the bus bar arrangement comprises only a bus bar from the first bus bar set on at least one side of the substrate. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the active stack further comprises an ion conducting layer between the cathodic electrochemical layer and the anodic electrochemical layer. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the active stack further comprises an anodic electrochemical layer between the first transparent conductive layer and the second transparent conductive layer and a cathodic electrochemical layer between the first transparent conductive layer and the second transparent conductive layer. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the first transparent conductive layer is between the substrate and the second transparent conductive layer. ### Claim 11 An apparatus comprising: a substrate comprising at least four sides; a first transparent conductive layer; a second transparent conductive layer; at least one active layer; a first bus bar set comprising a plurality of bus bars, wherein each bus bar of the first bus bar set is electrically coupled to the first transparent conductive layer; a second bus bar set comprising a plurality of bus bars, wherein each bus bar of the second bus bar set is electrically coupled to the second transparent conductive layer, and a bus bar arrangement wherein the bus bar arrangement comprises a first bus bar from the first bus bar set wrapping around a first corner, a second bus bar from the first bus bar set wrapping around a second corner, and a bus bar from the second bus bar set between the first bus bar of the first bus bar set and the second bus bar of the first bus bar set, wherein the bus bar arrangement is configured to alternate between a bus bar from the first bus bar set and a bus bar from the second bus bar set along the periphery of the substrate, wherein a bus bar from the first bus bar set and a bus bar from the second bus bar set are in-line with each other along the periphery. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the substrate is a trapezoid. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein the first corner is where two sides of the at least four sides of the substrate meet. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein wrapping around the first corner comprises the first bus bar from the first bus bar set continuously going from one side of the two sides of the first corner to a second side of the two sides of the first corner. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein each bus bar is separated by a gap. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the bus bar arrangement further comprises a bus bar from the first bus bar set and a bus bar from the second bus bar set on at least three sides of the substrate. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the bus bar arrangement comprises only a bus bar from the second bus bar set on at least one side of the substrate.