LIGHT GUIDE AND LIGHTING DEVICE WITH PARALLEL LIGHT SOURCE

摘要

The present invention discloses a light guide and a lighting device with parallel light source. The light guide comprises a body with a light incident side and a light emergent side. The body comprises: a light incident surface; light emergent surfaces; and a light guide surface group provided with a plurality of light guide surfaces and used for guiding at least a part of the rays of light guided into the body via the light incident surface by total reflection, and determine out-emitting positions of the part of the light rays guided by total reflection by the light guide surface group, on the light emergent surfaces, so that the body is formed with bright areas with guided-out rays of light and dark areas without guided-out rays of light on the light emergent surfaces.

主权项

1. A light guide of a lighting device with parallel light source, comprising a body with a light incident side and a light emergent side, the body comprising:
a light incident surface, which is a surface of the body at the light incident side, and exactly faces a light emergent surface of a parallel light source so as to guide parallel rays of light emitted from the parallel light source into the body; light emergent surfaces, which are surfaces of the body at the light emergent side, and are used for guiding the parallel rays of light in the body out of the body; and a light guide surface group, which is provided with a plurality of light guide surfaces and is used for guiding at least a part of the parallel rays of light guided into the body via the light incident surface by total reflection through interaction of the plurality of the light guide surfaces, and the plurality of the light guide surfaces interact with the light emergent surfaces to determine out-emitting positions of the rays of light guided by total reflection by the light guide surface group, on the light emergent surfaces, so that the body is formed with bright areas with guided-out rays of light and dark areas without guided-out rays of light on the light emergent surfaces.