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Illumination articles

  • US 9,823,402 B2
  • Filed: 10/16/2013
  • Issued: 11/21/2017
  • Est. Priority Date: 10/19/2012
  • Status: Active Grant
First Claim
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1. An illumination article comprising:

  • a wearable device configured to wear on the head of a wearer;

    a lightguide disposed on the wearable device, wherein the lightguide is elongated and has a first end and a second end opposite the first end; and

    a first light source positioned at the first end, configured to emit light into the lightguide;

    wherein the lightguide further comprises;

    a light emitting surface extending generally in an x-direction between the first and second ends; and

    a light reflecting surface positioned opposite to the light emitting surface;

    wherein the light reflecting surface comprises a plurality of light extractors configured to direct light in a y-direction perpendicular to the x-direction, andwherein the light emitting surface is configured to direct light away from the wearer and quasi-collimate the light in a direction substantially parallel to an xy-plane.

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