# US 2019/0168672 A1 · Interior rearview mirror assembly for a vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168672 A1 - Document ID: US20190168672A1 - Status: Published application - Kind: A1 - Application number: 16/258,789 - Filed: 2019-01-28 - Published: 2019-06-06 - Earliest claimed: 2009-04-23 - Assignees: Magna Mirrors of America, Inc. - Applicants: Magna Mirrors of America, Inc. - Inventors: Darryl P. De Wind; Michael J. Baur; Timothy G. Perkins - Web page: https://patentgrep.com/patent/US20190168672A1 ## CPC - B60R 1/04: mounted inside vehicle {(B60R1/025, B60R1/08 take precedence)} - B24B 9/02: characterised by a special design with respect to properties of materials specific to articles to be ground - B24B 9/08: of glass - B24B 13/00: Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor (edging optical work, e.g. lenses, prisms B24B9/14) - B24B 49/00: Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation (B24B33/06, B24B37/005 take precedence; if applicable to other machine tools, B23Q15/00 - B23Q17/00 take precedence) - B60R 1/086: {using a mirror angularly movable between a position of use and a non-glare position reflecting a dark field to the user, e.g. situated behind a transparent glass used as low-reflecting surface; Wedge-shaped mirrors} - B60R 1/088: {using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors} - B60R 1/12: Mirror assemblies combined with other articles, e.g. clocks - C03C 17/06: with metals (C03C17/34, C03C17/44 take precedence) - G02B 7/182: for mirrors - G02F 1/153: Constructional details - G02F 1/157: Structural association of cells with optical devices, e.g. reflectors or illuminating devices - B24B 51/00: Arrangements for automatic control of a series of individual steps in grinding a workpiece (if applicable to other machine tools, G05B takes precedence) - B60R 1/1207: {with lamps; with turn indicators} - C03C 2217/25: Metals - C03C 2218/31: Pre-treatment - G02B 5/08: Mirrors {(vehicle mirrors involving special optical features B60R1/08)} - G02F 1/161: Gaskets; Spacers; Sealing of cells; Filling or closing of cells - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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 A vehicular interior rearview mirror assembly includes a mirror casing and an electro-optic mirror reflective element. The front glass substrate of the reflective element has a planar first surface, a planar second surface and a periphery surface extending therebetween. The mirror casing includes a central mounting element and two spaced apart attachment surfaces. The rear glass substrate of the reflective element is adhesively attached at the attachment surfaces. The central mounting element includes a pivot element that pivotally mounts at a mounting structure. A central cavity exists between the central mounting element and the rear glass substrate. The mirror assembly includes a curved outer surface that provides a rounded transition between the planar first surface of the front glass substrate and a less-curved outer surface of a side all of the mirror casing. No part of the mirror casing encroaches onto the planar first surface of the front glass substrate. ## Claims ### Claim 1 An interior rearview mirror assembly for a vehicle, said interior rearview mirror assembly comprising: a plastic mirror casing formed via a plastic injection molding process; an electro-optic mirror reflective element comprising a front glass substrate and a rear glass substrate spaced apart from said front glass substrate by a perimeter seal, wherein an electro-optic medium is sandwiched between said front glass substrate and said rear glass substrate and bounded by said perimeter seal; wherein said front glass substrate has a planar first surface and a planar second surface separated from said planar first surface by a thickness dimension of said front glass substrate; wherein said front glass substrate comprises a periphery surface extending between said planar first surface and said planar second surface and spanning the thickness dimension of said front glass substrate, said planar first surface facing a driver of a vehicle when said interior rearview mirror assembly is mounted in a vehicle equipped with said interior rearview mirror assembly; wherein a transparent electrically conductive coating is disposed at said planar second surface and is in contact with said electro optic medium; wherein said rear glass substrate has a third surface and a fourth surface, and wherein said third surface of said rear glass substrate is coated with a mirror reflector, and wherein said mirror reflector is in contact with said electro-optic medium; wherein said mirror casing comprises a central mounting element and two spaced apart attachment surfaces that are all formed during the plastic injection molding process that forms said mirror casing; wherein said rear glass substrate of said electro-optic mirror reflective element is adhesively attached at said attachment surfaces; wherein said central mounting element comprises a pivot element that pivotally mounts said mirror casing and said electro-optic mirror reflective element at a mounting structure, and wherein said mounting structure is configured to attach at an interior surface of the equipped vehicle; wherein a central cavity exists between said central mounting element and said fourth surface of said rear glass substrate of said electro-optic mirror reflective element; wherein said interior rearview mirror assembly comprises a curved outer surface that provides a rounded transition between said planar first surface of said front glass substrate and a less-curved outer surface of a side wall of said mirror casing; and wherein no part of said mirror casing encroaches onto said planar first surface of said front glass substrate. ### Claim 2 (depends on 1) The interior rearview mirror assembly of claim 1, wherein said curved outer surface comprises part of said mirror casing. ### Claim 3 (depends on 2) The interior rearview mirror assembly of claim 2, wherein said part of said mirror casing circumscribes and overlaps the periphery surface of said front glass substrate. ### Claim 4 (depends on 1) The interior rearview mirror assembly of claim 1, wherein said curved outer surface comprises the periphery surface of said front glass substrate. ### Claim 5 (depends on 4) The interior rearview mirror assembly of claim 4, wherein said curved outer surface of said front glass substrate is exposed to, is contactable by and is viewable by the driver of the equipped vehicle when said interior rearview mirror assembly is mounted in the equipped vehicle. ### Claim 6 (depends on 5) The interior rearview mirror assembly of claim 5, wherein the cross dimensions of said front glass substrate are larger than the cross dimensions of said rear glass substrate so that said front glass substrate extends beyond corresponding edges of said rear glass substrate, and wherein said rear glass substrate is received at and circumscribed by the side wall of said mirror casing. ### Claim 7 (depends on 1) The interior rearview mirror assembly of claim 1, wherein said attachment surfaces of said mirror casing are at front surfaces of a rear wall of said mirror casing, and wherein rear surfaces of the rear wall are exposed at the rear of said interior rearview mirror assembly. ### Claim 8 (depends on 7) The interior rearview mirror assembly of claim 7, wherein the rear surfaces of the rear wall comprise a decorative pattern. ### Claim 9 (depends on 1) The interior rearview mirror assembly of claim 1, wherein said attachment surfaces are attached at said rear glass substrate of said electro-optic mirror reflective element via double-sided adhesive tape. ### Claim 10 (depends on 9) The interior rearview mirror assembly of claim 9, wherein the adhesive tape at said attachment surfaces functions as an anti-scatter element at the rear of said electro-optic mirror reflective element. ### Claim 11 (depends on 1) The interior rearview mirror assembly of claim 1, wherein said front glass substrate has a perimeter band established along a perimeter border region of said planar second surface of said front glass substrate to render covert said perimeter seal to a person viewing said interior rearview mirror assembly when said interior rearview mirror assembly is mounted in the equipped vehicle. ### Claim 12 (depends on 11) The interior rearview mirror assembly of claim 11, wherein said perimeter band comprises a reflective perimeter band. ### Claim 13 An interior rearview mirror assembly for a vehicle, said interior rearview mirror assembly comprising: a plastic mirror casing formed via a plastic injection molding process; an electro-optic mirror reflective element comprising a front glass substrate and a rear glass substrate spaced apart from said front glass substrate by a perimeter seal, wherein an electro-optic medium is sandwiched between said front glass substrate and said rear glass substrate and bounded by said perimeter seal; wherein said front glass substrate has a planar first surface and a planar second surface separated from said planar first surface by a thickness dimension of said front glass substrate; wherein said front glass substrate comprises a periphery surface extending between said planar first surface and said planar second surface and spanning the thickness dimension of said front glass substrate, said planar first surface facing a driver of a vehicle when said interior rearview mirror assembly is mounted in a vehicle equipped with said interior rearview mirror assembly; wherein a transparent electrically conductive coating is disposed at said planar second surface and is in contact with said electro-optic medium; wherein said front glass substrate has a reflective perimeter band established along a perimeter border region of said planar second surface of said front glass substrate to render covert said perimeter seal to a person viewing said interior rearview mirror assembly when said interior rearview mirror assembly is mounted in the equipped vehicle; wherein said rear glass substrate has a third surface and a fourth surface, and wherein said third surface of said rear glass substrate is coated with a mirror reflector, and wherein said mirror reflector is in contact with said electro-optic medium; wherein said mirror casing comprises a central mounting element and two spaced apart attachment surfaces that are all formed during the plastic injection molding process that forms said mirror casing; wherein said rear glass substrate of said electro-optic mirror reflective element is adhesively attached at said attachment surfaces; wherein said central mounting element comprises a pivot element that pivotally mounts said mirror casing and said electro-optic mirror reflective element at a mounting structure, and wherein said mounting structure is configured to attach at an interior surface of the equipped vehicle; wherein a central cavity exists between said central mounting element and said fourth surface of said rear glass substrate of said electro-optic mirror reflective element; wherein said interior rearview mirror assembly comprises a curved outer surface that provides a rounded transition between said planar first surface of said front glass substrate and a less curved outer surface of a side wall of said mirror casing; wherein the periphery surface of said front glass substrate comprises said curved outer surface; wherein said curved outer surface of said front glass substrate is exposed to, is contactable by and is viewable by the driver of the equipped vehicle when said interior rearview mirror assembly is mounted in the equipped vehicle; and wherein no part of said mirror casing encroaches onto said planar first surface of said front glass substrate. ### Claim 14 (depends on 13) The interior rearview mirror assembly of claim 13, wherein no part of said mirror casing encroaches onto said curved outer surface of said front glass substrate. ### Claim 15 (depends on 13) The interior rearview mirror assembly of claim 13, wherein the cross dimensions of said front glass substrate are larger than the cross dimensions of said rear glass substrate so that said front glass substrate extends beyond corresponding edges of said rear glass substrate, and wherein said rear glass substrate is received at and circumscribed by the side wall of said mirror casing. ### Claim 16 (depends on 13) The interior rearview mirror assembly of claim 13, wherein said attachment surfaces of said mirror casing are at front surfaces of a rear wall of said mirror casing, and wherein rear surfaces of the rear wall are exposed at the rear of said interior rearview mirror assembly. ### Claim 17 (depends on 16) The interior rearview mirror assembly of claim 16, wherein the rear surfaces of the rear wall comprise a decorative pattern. ### Claim 18 (depends on 13) The interior rearview mirror assembly of claim 13, wherein said attachment surfaces are attached at said rear glass substrate of said electro-optic mirror reflective element via double-sided adhesive tape. ### Claim 19 An interior rearview Mirror assembly for a vehicle, said interior rearview mirror assembly comprising: a plastic mirror casing formed via a plastic injection molding process; an electrochromic mirror reflective element comprising a front glass substrate and a rear glass substrate spaced apart from said front glass substrate by a perimeter seal, wherein an electrochromic medium is sandwiched between said front glass substrate and said rear glass substrate and bounded by said perimeter seal; wherein said front glass substrate has a planar first surface and a planar second surface separated from said planar first surface by a thickness dimension of said front glass substrate; wherein said front glass substrate comprises a periphery surface extending between said planar first surface and said planar second surface and spanning the thickness dimension of said front glass substrate, said planar first surface facing a driver of a vehicle when said interior rearview mirror assembly is mounted in a vehicle equipped with said interior rearview mirror assembly; wherein a transparent electrically conductive coating is disposed at said planar second surface and is in contact with said electrochromic medium; wherein said front glass substrate has a reflective perimeter band established along a perimeter border region of said planar second surface of said front glass substrate to render covert said perimeter seal to a person viewing said interior rearview mirror assembly when said interior rearview mirror assembly is mounted in the equipped vehicle; wherein said rear glass substrate has a third surface and a fourth surface, and wherein said third surface of said rear glass substrate is coated with a mirror reflector, and wherein said mirror reflector is in contact with said electrochromic medium; wherein said mirror casing comprises a central mounting element and two spaced apart attachment surfaces that are all formed during the plastic injection molding process that forms said mirror casing; wherein said rear glass substrate of said electrochromic mirror reflective element is adhesively attached at said attachment surfaces; wherein said central mounting element comprises a pivot element that pivotally mounts said mirror casing and said electrochromic mirror reflective element at a mounting structure, and wherein said mounting structure is configured to attach at an interior surface of the equipped vehicle; wherein a central cavity exists between said central mounting element and said fourth surface of said rear glass substrate of said electrochromic mirror reflective element; wherein said interior rearview mirror assembly comprises a curved outer surface that provides a rounded transition between said planar first surface of said front glass substrate and a less curved outer surface of a side wall of said mirror casing; wherein said curved outer surface comprises part of said mirror casing; and wherein no part of said mirror casing encroaches onto said planar first surface of said front glass substrate. ### Claim 20 (depends on 19) The interior rearview mirror assembly of claim 19, wherein said mirror casing circumscribes the periphery surface of said front glass substrate. ### Claim 21 (depends on 19) The interior rearview mirror assembly of claim 19, wherein said attachment surfaces of said mirror casing are at front surfaces of a rear wall of said mirror casing, and wherein rear surfaces of the rear wall are exposed at the rear of said interior rearview mirror assembly. ### Claim 22 (depends on 21) The interior rearview mirror assembly of claim 21, wherein the rear surfaces of the rear wall comprise a decorative pattern. ### Claim 23 (depends on 19) The interior rearview mirror assembly of claim 19, wherein said attachment surfaces are attached at said rear glass substrate of said electrochromic mirror reflective element via double-sided adhesive tape. ### Claim 24 (depends on 19) The interior rearview mirror assembly of claim 19, wherein the central cavity between said central mounting element and said fourth surface of said rear glass substrate accommodates a toggle mechanism.