Lightweight electrochromic mirror

  • US 6,195,194 B1
  • Filed: 03/16/1999
  • Issued: 02/27/2001
  • Est. Priority Date: 03/16/1999
  • Status: Expired due to Term
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First Claim
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1. A rearview mirror assembly for vehicles comprising:

  • an electrochromic (EC) mirror subassembly including a rear element of less than about 1.6 mm and with front and rear surfaces, a reflector associated with one of the front and rear surfaces, and an EC material for controlled dimming of reflections from the reflector;

    a carrier having a support surface shaped to closely match the desired shape and surface uniformity of the rear element;

    a retainer holding the EC mirror subassembly on the support surface with a distributed retention force that is sufficient to securely hold the rear element to the support surface, but that avoids undesired bending and stressing of the rear element; and

    wherein the EC mirror subassembly includes a front element that is less than about 1.6 mm thick, and wherein the front and rear elements each have a long dimension and a thickness satisfying the equation L/T2>

    75/mm. where L=a long dimension across the rear element, and where T=a thickness of a thickest one of the front and rear elements.

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