LIGHT GUIDE AND LIGHTING ASSEMBLY WITH ARRAY OF ROTATED MICRO-OPTICAL ELEMENTS

摘要

A light guide includes opposed major surfaces and a light input edge extending therebetween. An array of micro-optical elements of well-defined shape at at least one of the opposed major surfaces corresponds to the light input edge. Each of the micro-optical elements in the array includes a longitudinal axis arranged within the range of angles relative to the light input edge. A path linearly extending along the light guide from the light input edge intersects at least a portion of the micro-optical elements in the array, at least one of the micro-optical elements along the path arranged with its longitudinal axis at a positive angle relative to the light input edge, and at least another one of the micro-optical elements along the path arranged with its longitudinal axis at a negative angle relative to the light input edge.

主权项

1. A lighting assembly, comprising:
a light guide to propagate light by total internal reflection, the light guide comprising opposed major surfaces and a light input edge extending between the major surfaces in a thickness direction through which light is input into the light guide; a light source located adjacent the light input edge to edge light the light guide; and an array of micro-optical elements of well-defined shape at at least one of the opposed major surfaces, the array of micro-optical elements corresponding to the light source, each of the micro-optical elements in the array configured as a three-dimensional feature recessed into or protruding from the major surface and comprising a longitudinal axis arranged within the range of +45° to −45° relative to the light input edge, wherein a path linearly extending along the light guide from the light input edge and orthogonal to the light input edge intersects at least a portion of the micro-optical elements in the array, at least one of the micro-optical elements along the path arranged with the longitudinal axis thereof at a positive angle relative to the light input edge, and at least another one of the micro-optical elements along the path arranged with the longitudinal axis thereof at a negative angle relative to the light input edge.