Frameless prismatic mirror with improved edge protection

  • US 10,705,267 B2
  • Filed: 04/16/2018
  • Issued: 07/07/2020
  • Est. Priority Date: 04/17/2017
  • Status: Active Grant
First Claim
Patent Images

1. An interior prismatic rearview mirror assembly for a vehicle, said interior prismatic rearview mirror assembly comprising:

  • a mirror casing;

    a prismatic reflective element disposed at said mirror casing and comprising a glass mirror substrate that overlaps a front portion of said mirror casing;

    wherein said glass mirror substrate has a front surface and a rear surface, said front surface being closer to a driver of a vehicle when the interior rearview mirror assembly is normally mounted in the vehicle;

    wherein said rear surface of said glass mirror substrate has a reflector coating established thereat, with a protective coating disposed over said reflector coating;

    wherein said glass mirror substrate has a perimeter edge that circumscribes said glass mirror substrate and spans between said front and rear surfaces, and wherein said glass mirror substrate has a forward rounded perimeter region that provides a curved transition between said front surface and said perimeter edge;

    wherein said forward rounded perimeter region is contactable and viewable by the driver of the vehicle;

    wherein said glass mirror substrate has a rear perimeter edge region chamfered so that an angled surface is disposed between said rear surface and said perimeter edge;

    wherein said chamfered rear perimeter edge region of said glass mirror substrate extends at least 1.5 mm inboard from said perimeter edge of said glass mirror substrate;

    wherein said reflector coating and said protective coating are disposed at said rear surface where said angled surface meets said rear surface;

    an encapsulant disposed about a perimeter region of said rear surface so as to encompass and overlay said reflector coating and said protective coating at said rear surface and so as to encompass and overlay a portion of said angled surface; and

    wherein no part of said encapsulant is disposed at said forward rounded perimeter region.

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