# US 11,906,868 B2 · Obscuring bus bars in electrochromic glass structures > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,868 B2 - Document ID: US11906868B2 - Status: Granted - Kind: B2 - Application number: 17/900,886 - Filed: 2022-09-01 - Published: 2023-03-16 - Granted: 2024-02-20 - Earliest claimed: 2013-12-24 - Assignees: View, Inc. - Applicants: View, Inc. - Inventors: Robert T. Rozbicki; Gordon E. Jack; Disha Mehtani; Robin Friedman - Web page: https://patentgrep.com/patent/US11906868B2 ## CPC - G02F 1/157: Structural association of cells with optical devices, e.g. reflectors or illuminating devices - E06B 3/66314: {of tubular shape (E06B3/66323 and E06B3/66333 take precedence)} - E06B 3/6722: {with adjustable passage of light} - 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) - G02F 1/0147: {based on thermo-optic effects (G02F1/132 takes precedence)} - G02F 1/1345: Conductors connecting electrodes to cell terminals - G02F 1/153: Constructional details - G02F 1/155: Electrodes - E06B 3/5427: {the panes mounted flush with the surrounding frame or with the surrounding panes (E06B3/5436 takes precedence; supporting structures for curtain walls E04B2/885)} - E06B 3/66342: {characterised by their sealed connection to the panes} - E06B 2009/2464: {featuring transparency control by applying voltage, e.g. LCD, electrochromic panels} - G02B 5/23: Photochromic filters - G02F 1/161: Gaskets; Spacers; Sealing of cells; Filling or closing of cells - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract Embodiments described include bus bars for electrochromic or other optical state changing devices. The bus bars are configured to color match and/or provide minimal optical contrast with their surrounding environment in the optical device. Such bus bars may be transparent bus bars. ## Claims ### Claim 1 An electrochromic glass structure, comprising: a substantially transparent substrate; an electrochromic device coating disposed on the substantially transparent substrate, the electrochromic device coating having one or more transparent conductive layers; a bus bar configured to power the electrochromic device; and a strip of obscuration material along entire perimeter of the electrochromic glass structure, the strip of obscuration material located on a surface of the electrochromic glass structure between the bus bar and an exterior environment to the electrochromic glass structure. ### Claim 2 (depends on 1) The electrochromic glass structure of claim 1, wherein the strip of obscuration material has at least a width configured to block view of the bus bar from an observer viewing through the substantially transparent substrate. ### Claim 3 (depends on 1) The electrochromic glass structure of claim 1, wherein a width of the strip of obscuration material is greater than a width of the bus bar. ### Claim 4 (depends on 1) The electrochromic glass structure of claim 1, wherein the strip of obscuration material is on an outer surface of the substantially transparent substrate. ### Claim 5 (depends on 4) The electrochromic glass structure of claim 4, wherein the strip of obscuration material is a thin flexible material adhered to the outer surface of the substantially transparent substrate with an adhesive. ### Claim 6 (depends on 5) The electrochromic glass structure of claim 5, wherein the thin flexible material is anodized aluminum. ### Claim 7 (depends on 1) The electrochromic glass structure of claim 1, wherein a portion of the strip of obscuration material is located in a region between the bus bar and the substantially transparent substrate. ### Claim 8 (depends on 1) The electrochromic glass structure of claim 1, wherein the strip of obscuration material is located between an outer surface of the substantially transparent substrate and a surface of another substrate that is laminated to the outer surface of the substantially transparent substrate. ### Claim 9 (depends on 8) The electrochromic glass structure of claim 8, wherein the strip of obscuration material is in or part of a lamination adhesive between the substantially transparent substrate and the other substrate. ### Claim 10 (depends on 8) The electrochromic glass structure of claim 8, wherein the strip of obscuration material is on a surface of the other substrate. ### Claim 11 (depends on 1) The electrochromic glass structure of claim 1, wherein the strip of obscuration material comprises one or more of a paint, a polymeric coating, a tape, a metal strip, a foil, and a shim stock. ### Claim 12 (depends on 1) The electrochromic glass structure of claim 1, wherein the strip of obscuration material is a frit on a surface of the substantially transparent substrate. ### Claim 13 (depends on 1) The electrochromic glass structure of claim 1, wherein the strip of obscuration material is applied by one of screen printing, spraying, and ink jet printing. ### Claim 14 An insulated glass unit comprising: first and second substantially transparent substrates; a spacer between the first and second substantially transparent substrates; a primary seal between the spacer and the first substantially transparent substrate and between the spacer and the second substantially transparent substrate; an electrochromic device on at least one of the first and second substantially transparent substrates; and a bus bar associated with the electrochromic device and located under the spacer and in the primary seal, wherein the bus bar is located under the spacer and in the primary seal; and a strip of obscuration material along entire perimeter of the insulated glass unit, the strip of obscuration material located on a surface of one of the first and second substantially transparent substrates between the bus bar and a region outside the insulated glass unit; wherein the bus bar is obscured from sight by the obscuration material when viewed from a first side of the insulated glass unit. ### Claim 15 (depends on 14) The insulated glass unit of claim 14, wherein the strip of obscuration material is on an outer surface of the one of the first and second substantially transparent substrates. ### Claim 16 (depends on 14) The insulated glass unit of claim 14, wherein a portion of the strip of obscuration material is located in a region between the bus bar and the one of the first and second substantially transparent substrates. ### Claim 17 (depends on 14) The insulated glass unit of claim 14, wherein the strip of obscuration material is located between an outer surface of the one of the first and second substantially transparent substrates and a surface of another substrate laminated to the outer surface of the one of the first and second substantially transparent substrates. ### Claim 18 (depends on 14) The insulated glass unit of claim 14, wherein the strip of obscuration material comprises one or more of a paint, a polymeric coating, a tape, a metal strip, a foil, and a shim stock. ### Claim 19 (depends on 14) The insulated glass unit of claim 14, wherein the strip of obscuration material is a frit on the surface of the one of the first and second substantially transparent substrates. ### Claim 20 (depends on 14) The insulated glass unit of claim 14, wherein the strip of obscuration material is laminated between the one of the first and second substantially transparent substrates and another substrate. ### Claim 21 (depends on 20) The insulated glass unit of claim 20, wherein the strip of obscuration material is in or part of a lamination adhesive. ### Claim 22 (depends on 14) The insulated glass unit of claim 14, wherein the bus bar is also obscured from sight by the spacer when viewed from the opposite side of the insulated glass unit.