Vehicular exterior rearview mirror assembly with blind spot indicator

  • US 10,308,186 B2
  • Filed: 12/10/2018
  • Issued: 06/04/2019
  • Est. Priority Date: 09/14/2005
  • Status: Active Grant
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First Claim
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1. An exterior rearview mirror assembly for a vehicle equipped with a blind spot monitoring system, said exterior rearview mirror assembly comprising:

  • a mirror reflective element sub-assembly;

    said mirror reflective element sub-assembly comprising an electrochromic mirror reflective element having a front glass substrate and a rear glass substrate with an electrochromic medium disposed therebetween;

    wherein said front glass substrate has a first surface and a second surface;

    said second surface of said front glass substrate having a transparent electrically conductive layer disposed thereat;

    wherein said rear glass substrate has a third surface and a fourth surface;

    a metallic mirror reflector disposed at said third surface of said rear glass substrate;

    wherein said metallic mirror reflector of said rear glass substrate comprises a light transmitting aperture established therethrough, said light transmitting aperture having the form of an icon;

    wherein said electrochromic medium is disposed in an interpane cavity established between said third surface of said rear glass substrate and said second surface of said front glass substrate and is bounded by a perimeter seal;

    said mirror reflective element sub-assembly comprising a heater pad, wherein said heater pad comprises a light transmitting aperture;

    wherein said mirror reflective element sub-assembly comprises a mirror back plate, said mirror back plate comprising a light-transmitting aperture;

    wherein said mirror back plate has a front plate side and a rear plate side spaced from said front plate side by a thickness dimension of said mirror back plate;

    wherein said heater pad is disposed between said fourth surface of said rear glass substrate and said front plate side of said mirror back plate, with said light transmitting aperture of said heater pad juxtaposed with said light transmitting aperture of said metallic mirror reflector of said rear glass substrate and with said light transmitting aperture of said heater pad juxtaposed with said light transmitting aperture of said mirror back plate;

    said mirror back plate comprising first structure at said rear plate side, wherein said first structure is configured to attach at an electrically-operable actuator that is operable to move said mirror reflective element sub-assembly about two orthogonal axes to allow a driver of a vehicle equipped with said exterior rearview mirror assembly who is viewing said electrochromic mirror reflective element to adjust his or her rearward view;

    wherein said mirror back plate is formed of a polymeric material by injection molding and wherein said first structure and said light transmitting aperture of said mirror back plate are formed during injection molding of said mirror back plate;

    a blind spot indicator having a light source that is electrically activatable to emit light;

    wherein said light source comprises at least one light emitting diode having a luminous efficiency of at least 5 lumens per watt;

    wherein said blind spot indicator is disposed at said light transmitting aperture of said mirror back plate;

    wherein said blind spot indicator, when said light source is activated, emits light through said light transmitting aperture of said mirror back plate and through said light transmitting aperture of said heater pad and through said electrochromic mirror reflective element;

    wherein movement of said mirror backing plate by said actuator moves said blind spot indicator and said electrochromic mirror reflective element in tandem;

    wherein, when said exterior rearview mirror assembly is attached at a side of the equipped vehicle and when said light source is activated, light emitted by said light source passes through said light transmitting aperture of said metallic mirror reflector, forming an illuminated icon viewable by the driver of the equipped vehicle viewing said electrochromic mirror reflective element; and

    wherein a blind spot monitoring system of the equipped vehicle activates said light source of said blind spot indicator forming said illuminated icon to indicate to the driver of the equipped vehicle presence of another vehicle in a traffic lane adjacent the side of the equipped vehicle at which said exterior rearview mirror assembly is attached.

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