Light emitting devices and applications thereof

摘要

In one aspect, the present invention provides light emitting devices, including light fixtures and luminaires. In some embodiments, a light emitting device comprises at least one light source, a lightguide operable to receive light from the at least one light source at a first location on the lightguide, at least one light extraction region optically coupled to the lightguide and a substantially non-scattering region along a portion of the lightguide.

主权项

1. A light fixture, comprising:
at least one light source; and a lightguide that forms
an edge surface, andan upper surface and a lower surface that are in facing opposition to one another, are substantially horizontal and are orthogonal to the edge surface where the upper and lower surfaces abut the edge surface; the lightguide being operable to couple light from the at least one light source through the edge surface into the lightguide, and including
a substantially non-scattering region comprising substantially non-scattering surface portions of each of the upper and lower surfaces in facing opposition to one another, with a substantially non-scattering portion of the lightguide therebetween, such that the lightguide contains the light by total internal reflection in the substantially non-scattering region, anda light extracting region that disrupts the total internal reflection such that parts of the light coupled to the light extracting region are emitted upwardly from the upper surface and downwardly from the lower surface of the lightguide, the light emitted upwardly forming an indirect light output and the light emitted downwardly forming a direct light output; the lightguide being curved along a width thereof, such that the curvature of the lightguide and the light extracting region provide the indirect light output with a two lobed, far field photometric distribution.